The Mass Air works with the MAP sensor for accurate air readings. 09-12-13, 04:50 PM #9. 52 for B2S2. Now the engine has warmed up to normal and the MAF is reading 0. At the other end, I could obtain voltage readings in excess of 5 volts, recording 500 CFM at 5. DTC P0102 Mass Air Flow (MAF) Sensor Circuit Low Frequency. After that, I wanted to adjust the MAF table according to the config of MAF-STFT, and it did not work as I just installed the V 3. Fuel trim code(s). 75%, congratulations, you calibrated your non-Pe section of your MAF table using STFT and your narrow band 02 sensors. The car runs rich at idling or lean when running. Currently mine is Revo stage 2+ pulling 259 g/s which is roughly 335 BHP using the divide by 0. The vast majority of all MAF and MAP sensors are of this type. 2 V8 Mass Air Flow Meter MAF Sensor L76 L77 L98 LS2 LS3 Commodore HSV New Genuine LVL2 - Back LH Corner 92281162. Run the engine at each of the above-mentioned speeds and record the MAF sensor PID values on the graph. Getting code P0151 on the Scan Gauge, found the exhaust fitting on the drivers side, just in front of the O2 sensor, had a stripped bolt and a small gap. Barometric pressure sensor fault causing base read problems (air flow calculations). The 89-93 Mustangs (and the 94-95’s as well as some ’88 MAF equipped Mustangs) will allow you to use a jump wire and count the check-engine light in the dash. To double check the MAF sensor part # (and to replace the VR6 MAF sensor that just went on my car), I ordered a 2. I braced for the expense of possibly changing the MAF sensor, the O2 sensors and/or intake gaskets after reading about these codes thru numerous forums. Fuel trim code(s). Much of the design of the upstream (of the MAF) air induction is to protect it from such as water and oil. Mass Air Flow (MAF) Sensor Adaptor Kit 3 Inch Alloy Tube with 3 flow calibration tubes + 5 mass air flow sensor adaptors. Performed leak test of Intake and Intercooler. Black smoke coming from the tail-pipe. common problem on ranger,MAF getting bad and you already paralize it more when you cleaned it , as gearbox1 said ,,disconnect the sensor and it should be better a bit,,because what happen is,,when you disconnect it the PCM automatically replace it with a reading that will make the car run so you could drive the car to a shop,,. Thread: Mass air flow sensor reading 0. The MAF (Mass Air Flow). 1v for lean and 0. Could someone post MAF readings on vehicle with normal MPG more than 14-16? What does it shows on idle?. 57 main boards, as well as the DIYPNP. In answer to your question 4. The sensor will fit the 1. 7:1, so it does some damage to your engine either the ratio is too high or too low. I am getting a MAF signal code (P0102) and I know it is not working properly because the signal from signal wire is supposed to change from 0-5 volts when the rpm's increased and yes of coarse I back probed it, I even cut some of the insulation of of wire to make sure I was getting good connection while reading it with my multi-meter. Pulses are separated by Short Pauses (0. At idle, it should read between 4gm/s - 7gm/s on a fully warmed up engine. - Dirty, obstructed or faulty mass air flow sensor (MAF) - Cracked, ripped or disconnected intake boot (snorkel) - Vacuum leaks (from stuck open PCV valve, leaking intake gaskets, etc. What can be confusing when dealing with and tuning a maf sensor is that the computer will often interpret the MAF data to depict an actual load value instead of an actual. Try cleaning the MAF sensor and recheck operation. 52 for B2S2. My MAF sensor went out on a 2000 Buick Regal, and i replaced the MAF sensor, it was still acting as though it was not working and the service engine light still came on, and the obd still said it was the MAF sensor. Thanks for the help. Intake Air Temperature (IAT) sensor connector terminal identification — 1994–96 models ; Compare the resistance reading with the accompanying chart. The pink EGR actual trace on the graph roughly follows the EGR specified trace. The total mass of air which flows through the engine (as measured by the MAF sensor or calculated using MAP, RPM and IAT) is divided by the A/F ratio (e. Performed leak test of Intake and Intercooler. Mass Air Flow Sensor - LMM-H03 LMM-H03 is a thermodynamic sensing element for the bi-directional measurement of mass air flow in a well defined channel. 5 inch housing and has a 5 pin connector with the following pinout: Pin 1 - IAT sensor output (not used on MS42 or MS43). I found: On the ouside of the MAF housing tube: VW #: 06A 906 461A Bosch #: 0 280 218 002 On the MAF sensor itself:. In most cases, the MAF sensor will realize the change in airflow, and the fueling will still be correct. 5mm Security Torx. Thanks for reading this article on cleaning a Mass Airflow Sensor. Cold Wire MAF Sensors. 0T, Volkswagen Golf VI 2. It should be roughly 30-45 psi and increase. Then remove the two Torx head bolts using your Torx pattern driver. If your '03-'07, 5. 3 Most Common Bad MAF Sensor Symptoms. With the J 23738-A or J 35555, apply 5 inches Hg (17 kPa) of vacuum to the MAP sensor. MAP sensor reading. 0 reading for MAF by accident. 45 volts (oxygen sensor resistance high), it judges that the air/fuel ratio is lean. SLX 1999-1996 3. In general, a “hot wire” MAF sensor produces an input to the PCM when a low-amperage electrical current is passed through a metal-film resistor suspended in the MAF’s air stream. 2003 Ford Escape Mass Air Flow Sensor Customer Reviews. C&L 80mm MAF Mass Airflow Sensor for 86-93 5. Old Sensor looked brand new so thot it was going to be something else. Better idle with Mass Airflow Sensor unplugged. I feel that the car is laggy, and when I plug into the ECU with a diagnostics computer, I'm seeing that the upstream O2 sensor (#1) is reading about 3. Every MAF is different meaning each one will give a different Hz number the computer reads for a given gram per second of air. 9v for rich. 82grams/second maximum. Apart from that, the sensor sends info to the powertrain control module (PCM), the part that controls how the engine works and manages fuel usage. 8L Edition Replace # 5WK9605 13621432356 3. Coolant temperature sensor ‫الحرارة‬ ‫حساس‬ • The coolant temperature sensor is used to measure the temperature of the engine coolant of an internal combustion engine. The MAF output must be a smooth even increase as engine speed increases. The MAF, Mass Air Flow meter is the sensor who indicates to the ECU (car computer) the air mass who flow inside the engine. - Mass Air Flow (MAF) meter - Engine Coolant Temperature (ECT) sensor - Fuel pressure - Gas leakage from exhaust system - Open or short in A/F sensor (bank 1, 2 sensor 1) circuit - A/F sensor heater relay - A/F sensor heater and A/F sensor heater relay circuits - PCV hose connections - PCV valve and hose - ECM. I have read that for the F-series it is supposed to be in the 4. Verify any dirty build up that would obstruct the engine computer's reading of the air flow. The Mass Air Flow (MAF) Sensor measures the flowrate of air through the air intake before reaching the engine. AEM Intake temp sensor: 30-2010. Coolant temperature sensor ‫الحرارة‬ ‫حساس‬ • The coolant temperature sensor is used to measure the temperature of the engine coolant of an internal combustion engine. If there’s no leak, the sensor needs to be replaced. If I check using my multimeter (Fluke 8062A) in standard ohm measurement mode, I get a reading of non-continuity. com - UK Porsche 911 Resource Site & forum, Porsche Specialist, Insurance, parts, sales. Working with readings from the oxygen sensors, the mass air flow sensor can make precise adjustments to the air/fuel ratio. 0 engine, the IAT sensor is in the intake manifold behind the throttle body. 8L turbo engine, rated at 180hp, should have a max flow of about 144g/s. RS4 K04 Fueling Kit Update 2. We test drove it and it worked on that car, the power was back and it revved right out. A dirty or faulty (MAF) Mass Air Flow sensor affects fuel trim resulting in a loss of power, hesitation, and reduced fuel mileage. Could someone post MAF readings on vehicle with normal MPG more than 14-16? What does it shows on idle?. Watch for sudden changes when engine speed is relatively steady. The only notable area of difference I could see is when you slam the throttle shut, the MAF sensor will show a steady reading of air while the RPM drops, but the MAP sensor will show a lower vaccum at higher RPM and then vaccum decreasing slightly as the RPM drops. Jump to Latest Follow 1 - 19 of 19 Posts. Couple of sensors replaced under warranty, which is good. JC – yep, this is new vehicle. Also, my Autoenginuity scanner is not showing any significant readings above 0. So that air mass reading is 4 or more times higher than possible if. This is the second MAP sensor reading. Leaks in the air induction system or intake manifold can cause the MAF sensor to produce false readings, so can faulty wiring. The gas readings result in a calculated value of 1. If the MAF is reading in this range, one can be pretty sure that it is not the problem that is causing the car to not run properlyparticularly at idle. Ensure you measure the I. Back again with same fault. Oxygen Sensor. In answer to your question 4. Hey guys I have a 1988 5. 413 which is about as low a reading as it has given so far. If during key ON engine running self-test the comparison of the TP sensor and MAF sensor readings are not consistent with calibrated load values, the test fails and a diagnostic trouble code is stored in. DODGE Caravan mass air flow sensors are commonly misdiagnosed. 0 volt or a pulse-width modulation (PWM) signal that is proportional to the air mass flow rate, and both sensors have an intake air temperature (IAT) sensor incorporated into their housings for most post on-board diagnostics (OBDII) vehicles. 7L,03-15 Murano 3. The MAF sensor measures the amount of air entering the engine so that the engine control module can determine the amount of fuel to inject. However, if I check the. Set your DMM to the Ohms scale. A fuel-injected engine may alternatively use a mass airflow sensor (MAF sensor) to detect the intake airflow. OBD2 readings are always the actual readings from a component, OEM side readings may be substituted to keep the vehicle running so they can be misleading. my 2001 focus 1. MAF Codes that light up the CHECK ENGINE LIGHT (CEL) on your Instrument Cluster: P0102 MAF Signal Low Input to PCM. Only one terminal of the sensor will give you a reading, and that one is for the gauge. Good day, I found your article very interesting and helpful, but, i have a question for you. The unit ships with the tuning software and a vehicle specific connection guide for the vehicles listed below. 5 PK - 439 - Ignition 1 Voltage C - 0. Dirt and oil deposits can build up on the sensor element, adversely affecting readings. We should see a reading of 10,000 ohms or more. I got live data readings on notepad as a dtc trigger (at idle). 86mm LS1 shown in photo. The other is for the light and won't come on unless the temperature is above 235. 9 PSIg engine load with the car off. What is the Mass Air flow (MAF) sensor? The MAF sensor also known as meter is located after the air filter, in the engine intake. I cleaned the sensor before thich is ese readings and got slight improvements but only slight. "The scan tool reads the MAF value and displays it in grams per second (gm/s). I have increased the RPM's from about 700-2000 and the MAF still shows 0. In automotive applications, air density varies with. The Premier Gear PG-MAF10140 (around $69) is an affordable component that can help correct some of the causes of engine hesitation. Replacing a mass air flow sensor is fairly straight forward, so most of the cost comes from the cost of the part, and not the labor. Set your meter at or close to 10 V DC. Use of any other type cleaner may damage the sensor. 75%, congratulations, you calibrated your non-Pe section of your MAF table using STFT and your narrow band 02 sensors. 5L (X) 215" 8-12160-244-0 12130 BENTLEY 8 CYL. PLEASE provide some numbers to compare to before I waste $150 on a part. Mass Air Flow Sensor - LMM-H03 LMM-H03 is a thermodynamic sensing element for the bi-directional measurement of mass air flow in a well defined channel. Oxygen Sensor. min) 3V (2XAA) feed, OBD-II reported MAF V = 2, MAF Rate: 3. 0 volts for a conventional zirconia O2 sensor). Satisfactory and unsatisfactory MAF sensor frequency readings. A mass air flow (MAF) sensor responds to the amount of air flowing through a chamber containing the sensor. Symptoms were Chk Eng Lite, Power Steer Lite, OBD codes displayed for the sensor & also said Too Rich (Bank One) Car would. Any help would be appreciated by this new guy. but undriveable until I can get the part and do. This is obviously a lean mixture, in this case caused by a lazy oxygen sensor and a bad plug wire on an '86 Volkswagen Jetta. Mass air flow sensor reading 0. The design and function of the mass air flow sensor To understand the reason for replacement, you need to know how this mass air flow (MAF) sensor works. The only notable area of difference I could see is when you slam the throttle shut, the MAF sensor will show a steady reading of air while the RPM drops, but the MAP sensor will show a lower vaccum at higher RPM and then vaccum decreasing slightly as the RPM drops. The mass air flow sensor is designed to measure the amount of the air an engine takes in. JC – yep, this is new vehicle. Another simple method to check MAF sensor Disconnecting the MAF and starting engine may help to determine whether the MAF is really causes a problem. Once we have MAF integrated over time, we can calculate fuel flow using a specific air/fuel mixing ratio (A/F). If you are going to replace the MAF yourself, then I'd always recommend buying an OEM mass air flow sensor. There are several different types of MAF sensors but for most GM applications it is a frequency biased "cold-wire" sensor that generates a signal between 0 and 15k Hz. But even just rotating the sensor to a different angle will change how the air flows through the MAF sensor, if it was flowing more to one side it and the sensor was in the main air flow or would then be on the side with a lesser air flow which again would cause it to read wrong and in this case read low and cause lean running. Both sensor designs output a 0. (Chevy, Bui. 0 for your AWE Tuning RSK04 fueling kit applies to 2000 S4s. The MAFs are very particular. Mass Airflow Sensors. The voltages are around 0. Warning: When this patch is active the ecu will ignore the MAF sensor readings even if it's plugged in, so be careful and tune the ip_maf_1_diag__n__tps_av table very carefully before applying this. Once you know, you Newegg!. As rewmer said the initial (pre clean) idle reading looked acceptable, after the clean it's still in range - but just. Is this a good MAF or is this bad and needs replacment? Engine runs a little rough and I recently cleared a catalytic converter code. A proportion of this air flow is ducted off from the main air stream to the side into an aperture in which two wire elements are situated: one is a sensing wire and the other is a compensating wire. 5 YE - 492 - MAF Sensor Signal B - 0. MAP Sensor assembled in the USA, unlike the current Delphi production. The actual MAP sensor is on the manifold. The Mass Air Flow sensor is a very delicate sensor. It relays to the ECU the amount of air actually flowing in. Most modern MAF sensors also contain an IAT sensor. A typical analog sensor has two elements that measure temperature, a “cold” wire that measures the intake air temperature, and a “hot” wire mounted next to it that. 2, MAF Rate - small change (~0. 2 SXI - Corsa 1. It provides the ECM and TCM with valuable information regarding engine load. On the Jeep 4. It is primarily intended for Ford trucks but also applies to other Ford models that have a MAF sensor. I got faultcode for MAF range. Jumping ahead, this problem may have different causes, but in almost every Mercedes in the '90s, the most likely cause is the Mass Air Flow (MAF) sensor! MAF Functions. The 89-93 Mustangs (and the 94-95’s as well as some ’88 MAF equipped Mustangs) will allow you to use a jump wire and count the check-engine light in the dash. 2 - what should MAF reading be? - Railroad. Lean and/or rich code(s). Correct reading should be between around 0. 2 SXI - Corsa 1. A cheap alternative for the HPX PMAS MAF is the Audi RS4 B5 MAF sensor manufactured by Bosch and is able to measure upto 1800kg/h. Any help would be appreciated by this new guy. 440T4 / 4T60, 4T60-E, & 4T65. With a normal idle speed, it will normally read 4-6, and, may read 7 if the programmed idle is around 800/850 rpm as the faster idle will require more air thru the sensor. Good day, I found your article very interesting and helpful, but, i have a question for you. Finally, lift the MAF sensor from the metal body. value: approx. 8 BK/WH - 451 - Ground C - 0. At each stage of my car (07 S3) being mapped I have taken MAF readings and other logs to check my car is running as it should. if you uplug the MAF and problem goes away then you have a bad MAF sensor. BRAND NEW GENUINE Bosch MAF Sensor for 1. 0 for your AWE Tuning RSK04 fueling kit applies to 2000 S4s. Air Flow Meters are a common problem on most European cars at the moment and Alfa Romeo are no exception. MafCyl - the air flow that goes into the cylinder (g/sec) MafMap - the manifold air pressure calculated from the MAF reading, Ideal Gas Law, and rpm (kPa). This upgrade provides a more precisely calibrated metered air flow than the factory stock Ford Mustang MAF Sensor. But is reading OK when engine running and rev-ed up. 5 kPa at 5 volts. Jeep Wrangler 2. The voltages are around 0. If you are able to view the MAF sensor signal voltage on an OBD2 scanner, then do so. Much of the design of the upstream (of the MAF) air induction is to protect it from such as water and oil. The ECM (Electronic Control Module) needs to know intake air volume to calculate engine load. be/E8sBg7kMbOw The procedures shown in this video can be applied to all 3-wire General Motors MAF sensors. The other type of sensor is a frequency type. Check sensor for carbon accumulation or contaminants which can cause false readings. In answer to your question 4. Step 3 - Soak the MAF in Alcohol. 9L Dodge Cummins Turbo Diesel truck is experiencing poor engine performance by getting the wrong amount of fuel to the engine, it could be the manifold pressure sensor. If the reading is approximately 0. This is the second MAP sensor reading. The jump wire (I’d use spades on each end) would connect the STI (test input) with #2 pin on the connector, see below:. This MAP sensor is mounted directly to the intake manifold, but others might be connected by a hose. The car runs rich at idling or lean when running. The mass air flow (MAF) sensor is an important component which the engine control unit depends on. The sensor for volume consumption of air is used in many systems for management of engines for measuring value of the transitory cost of air. Just got back from the parts store and changed the MAF sensor and the code is still there. The code reads: [8 DME Signal, air-mass flow sensor]. DTC P0102 Mass Air Flow (MAF) Sensor Circuit Low Frequency. Black smoke coming from the tail-pipe. Getting code P0151 on the Scan Gauge, found the exhaust fitting on the drivers side, just in front of the O2 sensor, had a stripped bolt and a small gap. Originally my car ran fine but my husband thought that putting aviation fuel in it would make it run better and give it more hp, over the course of a few weeks my car began acting up and hasn't. Some also measure the temperature of the air entering the engine. Because these sensors are directly exposed to the air, they pick up contaminants that alter their readings, which lead to rough running conditions. Intake Air Temperature (IAT) sensor connector terminal identification — 1994–96 models ; Compare the resistance reading with the accompanying chart. my 2001 focus 1. 5 BN/WH - 2760 - Low Reference LS7 Pin - Wire - Circuit - Function A - 0. - So for example the 1. 55grams/second minimum to 1. 5 grams per second increments. ) - Clogged up or improperly installed air filter - The mass air flow sensor element contaminated by excess oil from an oil-soaked air filter - Clogged-up catalytic converter or restricted exhaust Other possible. 06-30-2015 #3. MAP (Manifold Absolute Pressure) sensor popular for swaps as the wiring is less involved, air intake plumbing is usually heaps easy and the map sensor (around $30) is considerable cheaper than a MAF sensor ($200-$300). Mass Air Flow Sensor Investigations No dealership or service provider, when contacted, has ever been able to provide us with evidence to support this "myth," and in fact, our investigations have revealed that even authorized dealerships are simply speculating and do not have the test equipment necessary to know whether the sensor has failed or why. Mass Air Flow Sensor - Sensor with Housing, 2. 24 lb/min for MAF and 0 for MAF voltage Connected up the AutoTap, While running, disconnected MAF connector and feed power into connector signal leads via AA batteries. Can someone with a monitor check their MAF readings for me? Trying to diagnose an overfueling issue and I believe tha MAss Airflow Sensor could be the issue. Basically this P0101 diagnostic trouble code (DTC) means that there is a problem with the Mass Air Flow (MAF) sensor or circuit. The opposite would be true if the sensor was telling the ECU that it was currently running lean, it would richen the fuel map till the o2 sensor was reading stoic. A faulty MAF sensor can cause your vehicle to run too rich or run too lean. Thanks for the help. 440T4 / 4T60, 4T60-E, & 4T65. MAF Sensor Test Drive: A test drive is the best method of testing the MAF sensor. C) How to Test the MAF Sensor Voltage Signals. Seeing 150g/m at idle, maxing out at 600g/m around 2000rpm part throttle. 7L,03-15 Murano 3. 75%, congratulations, you calibrated your non-Pe section of your MAF table using STFT and your narrow band 02 sensors. 80 volts at idle. Plus MAF on diagnostics is reading a very small amount with engine switched off. AWM700 Series Amplified / Compensated Airflow Sensor - AWM720P1 / AWM730B5. The amperage flow through the resistor changes because the electrical resistance of the resistor is responding to the cooling effects of rapidly moving air. Barometric pressure sensor fault causing base read problems (air flow calculations). 5 bar MAP sensor: 30-2130-50. Or they set a code that sends you up barking the wrong diagnostic tree. 23 volts (Refer to equivalent grams/second chart in GO to Pinpoint Test DC ) in continuous memory or key ON and engine running indicates a hard fault. Mass Air Flow Cleaner (available at your local autoparts store) The Mass Air Flow Sensor sits within your cars air hose and lets the cars computer know how much air is flowing into the engine. At idle, it should read between 4gm/s - 7gm/s on a fully warmed up engine. Discussion Starter • #1 • Nov 15. An abnormal reading from a sensor can light up the Check Engine light on the dashboard, meaning that a trouble code has been stored in the computer. MAF Sensor Voltage: With the MAF sensor connected, probe the MAF sensor connector between MAF and the negative battery terminal and start the engine. This indicates the power input to the sensor is correct. Kia spectra Location:. Therefore, given that the sensor is supplied with a 5 V reference, a rich mixture will cause a high voltage output, around 4. The MAF sensor measures the amount of air entering the engine so that the engine control module can determine the amount of fuel to inject. 24 lb/min for MAF and 0 for MAF voltage Connected up the AutoTap, While running, disconnected MAF connector and feed power into connector signal leads via AA batteries. 0 bar MAP sensor: 30-2130-75. If MAF was bad to run 18% lean you MAF would have to be in the 3. When at rest, the MAP sensor reads atmospheric pressure at sea level (29. 40 lb/min Truck has Billet S366 No limit CAI GH tunes etc. Just be alert for these common symptoms: 1. Locate the MAF on top of the intake snorkel mount. The value you get, 'should' be ~80% of the rated horsepower. 9 out of 5 stars 119. Once you know, you Newegg!. people's readings from fuel consumption sensors in modern cars about 0. 5V when snapping the throttle open and closed. A dirty or faulty (MAF) Mass Air Flow sensor affects fuel trim resulting in a loss of power, hesitation, and reduced fuel mileage. Will probably be on one of your hoists in 2 or 3 weeks when I get home. Here is a fast and accurate way to track a MAF’s performance and output to the PCM. The MAF sensor reads the temperature and the amount of air flowing in the air intake. Mass Air Flow Cleaner (available at your local autoparts store) The Mass Air Flow Sensor sits within your cars air hose and lets the cars computer know how much air is flowing into the engine. Both sensor designs output a 0. Just figured if it is a bad MAF reading 0 the car wouldn't start but I really don't know. This MAF sensor is mounted in the top of the air filter housing. The other type of sensor is a frequency type. Jumping ahead, this problem may have different causes, but in almost every Mercedes in the '90s, the most likely cause is the Mass Air Flow (MAF) sensor! MAF Functions. As this was the first time making a full range of readings it’s possible the procedure still needs some improvement. Much of the design of the upstream (of the MAF) air induction is to protect it from such as water and oil. I'm pretty sure. When at rest, the MAP sensor reads atmospheric pressure at sea level (29. The MAF sensor can also be dirty or partially plugged with carbon causing a low reading. I just swapped in a known-good MAP sensor from another car and it gave me the exact same readings. THE CONVERSION TO KILO PASCALS updates. 3 and body ground. As rewmer said the initial (pre clean) idle reading looked acceptable, after the clean it's still in range - but just. 5 seconds 395 test failures in 400 test samples. Benji Jerew/Flickr/CC BY 2. Reproduced with permission from Fluke Corporation. As stated before, the Mass Air Flow Test is a very easy and simple test but there are a couple of things that. If after disconnecting the MAF nothing changes, it means, that MAF has became bad. 9 TDI PD Engines fitted with the engine codes listed below - Here at Darkside Developments we only own and work with TDIs, so you can be assured that you are dealing with experts who have an in depth knowledge and understanding of all things VW Diesel. Mercedes c class W203 MAF sensor brand new $35. 4V at 2,000 rpm. It was read from a BMW scanner, and I get the same code on my snap on scanner. Mass Air Flow (MAF) Sensor Circuit Low P0102 Detects a continuous short to low or a open in either the signal circuit or the MAF sensor MAF ≤ 1200 Hz Engine Running > 0 seconds Engine Speed ≥ 50 RPM System Voltage ≥ 8 volts The above must be present for a period of time greater than 0. Regularly cleaning and inspecting. June 8, 2018. That will cause the system to use a mass/air calculation and the car should drive. MAP sensor reading. 0 engine, the IAT sensor is in the intake manifold behind the throttle body. Depending on your MAF sensor, your voltage reading should be between 0. I cleaned the sensor before thich is ese readings and got slight improvements but only slight. AEM Intake temp sensor: 30-2010. Fuel trim code(s). Could someone post MAF readings on vehicle with normal MPG more than 14-16? What does it shows on idle?. Bosch number 0 281 002 216, VW number 028 906 461 and also Bosch number 0 280 217 121, VW number 06A 906 461. As far as I know these MAFs are equal. Vehicles prior to 1996 could have MAF without an IAT. 420 at tickover. MAP Sensor assembled in the USA, unlike the current Delphi production. Some injection systems use both MAF and MAP sensors. I think these reading are quite high and thought of buying new MAF sensor, does it makes any sense?. In this case the sensor communicates with the computer by means of a frequency. I'm not trying to figure out my fuel trims. Here is a fast and accurate way to track a MAF’s performance and output to the PCM. Backprobe the signal and ground wires (red probe to signal and black probe to ground). 8+ code)A major addition to the code is MAF (mass air flow) sensor capability and also a combined MAF/ MAP mode. This is the second MAP sensor reading. YAOPEI Mass Air Flow Sensor Meter Replace# 22680-7S000 AF10141 for Nissan Infiniti Altima G37 Suzuki,07-13 Sentra,05-15 Xterra,03-09 350Z 3. 0 engine, the IAT sensor is in the intake manifold behind the throttle body. This indicates the power input to the sensor is correct. OBD2 readings are always the actual readings from a component, OEM side readings may be substituted to keep the vehicle running so they can be misleading. The ECU gives a control voltage to the sensor of 5 volts. 8 Second pause (for NEW code), and then add the actual. 0 (x64) HEX-NET2 CB: 0. Vehicles with ESM use bothINCHES OF MERCURY (IN-HG) AND IN HERTZ the MAP and MAF for engine-running BARO (HZ). This is important as it allows your engine to regulate its performance and change the intake of air to keep your engine running in its best condition. The total mass of air which flows through the engine (as measured by the MAF sensor or calculated using MAP, RPM and IAT) is divided by the A/F ratio (e. 63 for B2S1 and 0. Check Eng ine Light The most reliable early symptom of a failing or failed MAF is the illumination of the check engine light on the instrument panel. MAP Sensor constantly measures the vacuum in the intake manifold. The MAF sensor uses the temperature difference between the coolant and air entering the fuel mix to determine airflow. Regularly cleaning and inspecting. I've cleaned the MAF, and did an OBD log of the MAF sensor at idle. A MAF sensor can be a flow restriction in cases where the MAF housing is the smallest portion of the intake system. This sensor is linked to the vehicle’s computer system, and in the event that there’s a leak in the EVAP, or perhaps a problem with the sensor, you will see a “check engine” signal. The readings from this sensor are then fed back to the engine control unit (ECU), which uses this data to adjust the fuel injection and ignition timing. The sensor on the outlet of the intercooler is functionally like a MAP sensor, it's the Turbocharger Boost Pressure Sensor. The test is best done with the sensor removed from the engine. 3 ALTERNATOR (10 A) fuse and the MAF sensor, then go to step 20. Anyone know what the MAF sensor output should be at idle on an '02 Focus SE 2. This is obviously a lean mixture, in this case caused by a lazy oxygen sensor and a bad plug wire on an '86 Volkswagen Jetta. 420 at tickover. MAF sensor readings in g/s ? LongTerm +14% short OK, need help Hello community, I am fighting with my hoe about increasing mpg. com - UK Porsche 911 Resource Site & forum, Porsche Specialist, Insurance, parts, sales. 413 which is about as low a reading as it has given so far. I cleaned the sensor before thich is ese readings and got slight improvements but only slight. What MegaSquirt units can I use this sensor with? This one works with V2. 5L that has an intermittent hard start and lost power issue with an associated P0193 Fuel rail pressure sensor code. Dirt and oil deposits can build up on the sensor element, adversely affecting readings. We drove it back, cleaned the MAF and problem solved. Fuel trim code(s). The ECM (Electronic Control Module) needs to know intake air volume to calculate engine load. 45 volts (oxygen sensor resistance high), it judges that the air/fuel ratio is lean. A MAF sensor needs to run properly because the ECU needs information about the amount of air in the engine. Have a 98 Xploder 5. Make sure the plug is pushed firmly home - it sometimes requires a firm shove. So the EGR actual trace should look similar to the EGR specified trace. A cheap alternative for the HPX PMAS MAF is the Audi RS4 B5 MAF sensor manufactured by Bosch and is able to measure upto 1800kg/h. The code reads: [8 DME Signal, air-mass flow sensor]. With the J 23738-A or J 35555, apply 5 inches Hg (17 kPa) of vacuum to the MAP sensor. The MAF sensor can also be dirty or partially plugged with carbon causing a low reading. What can be confusing when dealing with and tuning a maf sensor is that the computer will often interpret the MAF data to depict an actual load value instead of an actual. MAF Sensor Voltage: With the MAF sensor connected, probe the MAF sensor connector between MAF and the negative battery terminal and start the engine. Will a mass air flow sensor show a reading on the Edge at a idle? On a side note, is there any specific reason why 6. The Oxygen Sensor Output Voltage Bank 1-Sensor 1 is reading study but is it suppose to be that low at. Pressure Sensor Manufacturer. A "Meter" often referred to as the "MAF" is the result of the element AND THE HOUSING. Does it show good fuel trim and appropriate MAF sensor readings? Since total fuel trim stays well within the 0 ±10% range throughout the trace, it's a good bet that the MAF sensor is working well, at least under the sampled conditions. Measure voltage between MAF sensor/IAT sensor 5P connector terminal No. ID The Mass Air flow Sensor (photo) I think I’m going to end up replacing this, but I just want to make sure that THIS is the Mass Air Flow Sensor… Post categories In Volvo Experiences , Volvo 850 , Volvo S70 & V70 1998-2000 , Engine , Volvo XC70 & V70XC , Volvo C70 , Sensors. DODGE Caravan mass air flow sensors are commonly misdiagnosed. - Mass Air Flow (MAF) meter - Engine Coolant Temperature (ECT) sensor - Fuel pressure - Gas leakage from exhaust system - Open or short in A/F sensor (bank 1, 2 sensor 1) circuit - A/F sensor heater relay - A/F sensor heater and A/F sensor heater relay circuits - PCV hose connections - PCV valve and hose - ECM. 8 BK/WH - 451 - Ground C - 0. MAF Codes that light up the CHECK ENGINE LIGHT (CEL) on your Instrument Cluster: P0102 MAF Signal Low Input to PCM. My MAF Sensor has a reading of 0. Graph the frequency readings. Once we have MAF integrated over time, we can calculate fuel flow using a specific air/fuel mixing ratio (A/F). Oxygen Sensor. Pressure Sensor Manufacturer. The MAF sensor is an air flow meter that measures the amount of air entering the engine. I am getting a MAF signal code (P0102) and I know it is not working properly because the signal from signal wire is supposed to change from 0-5 volts when the rpm's increased and yes of coarse I back probed it, I even cut some of the insulation of of wire to make sure I was getting good connection while reading it with my multi-meter. Working with readings from the oxygen sensors, the mass air flow sensor can make precise adjustments to the air/fuel ratio. 9 TDI PD Engines fitted with the engine codes listed below - Here at Darkside Developments we only own and work with TDIs, so you can be assured that you are dealing with experts who have an in depth knowledge and understanding of all things VW Diesel. There are several different types of MAF sensors but for most GM applications it is a frequency biased "cold-wire" sensor that generates a signal between 0 and 15k Hz. A mass air sensor has a heated wire, and the incoming air cools it. VPWR open to MAF sensor PWR GND open to the MAF sensor MAF RTN circuit open to PCM MAF circuit shorted to GND Intake air leak (near the MAF sensor) A closed throttle indication (throttle position [TP] sensor system) Damaged MAF sensor Diagnostic Aids: A MAF V PID reading less than 0. We test drove it and it worked on that car, the power was back and it revved right out. The MAF (Mass Air Flow). With a normal idle speed, it will normally read 4-6, and, may read 7 if the programmed idle is around 800/850 rpm as the faster idle will require more air thru the sensor. The MAF sensor measures the volume and density of the air entering the engine. Correct reading should be between around 0. Check your gasket where the TB bolts on. Thanks for the help. A faulty MAF sensor can cause your vehicle to run too rich or run too lean. A continuous switch between 0. PLEASE provide some numbers to compare to before I waste $150 on a part. A speed density kit (Image via. Me thinks the MAP is faulty but at £130 a go don't want to commit. 5 g/s at idle, then I blip the throttle lightly which is the spike in the graph, then it goes back to idle at about 9. Finally, lift the MAF sensor from the metal body. 5L that has an intermittent hard start and lost power issue with an associated P0193 Fuel rail pressure sensor code. (See pix - MAFV is at PID# 1177 and is returning 0. Actual grams per second, voltage or frequency readings should come from the MAF signal data on the scan tool at. The MAF signal should follow smoothly with changes in engine speed. Anyone here know if this is normal or should it read 0 and I need to replace the maf sensor. I found out sensor 1 is an air fuel ratio sensor not an 02 sensor. I bought MAF sensor cleaner and a new air filter (the old air filter was very dirty). Black smoke coming from the tail-pipe. 0 also uses the same MAF sensors for both intakes, although not the. The MAP sensor is usually mounted directly to the intake manifold, somewhere after the throttle body, though some are mounted on the firewall or elsewhere in the engine bay, connected to the intake manifold via a vacuum line. Rather than calculating the air flow from the VE table and manifold pressure (MAP), the mass air flow sensor measure the amount of air directly. There is the full throttle/full load test others use and that is measure the MAF sensor readings at full throttle in 2/3 gear and the engine at maximum rpm. Now read off the MAF voltage reading. Mass air flow (MAF) readings are 6 g/s on 800RPM idling and no loading; 26 g/s 2400RPM and no loading; up to 140 g/s with wide open throttle acceleration. A clean MAF sensor will keep your mpg at its optimum, while a dirty MAF sensor will decrease your gas mileage. All of this happens in thousandths of a second, so it's understandable that when a mass air meter starts to fail, the engine runs poorly. The value you get, 'should' be ~80% of the rated horsepower. Fortunately, detecting bad MAF sensor symptoms is not rocket science. – Poor fuel economy. At each stage of my car (07 S3) being mapped I have taken MAF readings and other logs to check my car is running as it should. My MAF sensor went out on a 2000 Buick Regal, and i replaced the MAF sensor, it was still acting as though it was not working and the service engine light still came on, and the obd still said it was the MAF sensor. This means that your current MAF transfer will not be accurate for your new meter. So that air mass reading is 4 or more times higher than possible if. Pulses are separated by Short Pauses (0. NOTE - this engine is not at Idle. An abnormal reading from a sensor can light up the Check Engine light on the dashboard, meaning that a trouble code has been stored in the computer. In the truest sense of the words "Air/Fuel Sensor", that would mean the first O2 sensor from the head (located on the exhaust manifold). AEM Intake temp sensor: 30-2010. The total mass of air which flows through the engine (as measured by the MAF sensor or calculated using MAP, RPM and IAT) is divided by the A/F ratio (e. I tried disconnecting and checking the MAF cable for faults, but it seemed fine. Performed leak test of Intake and Intercooler. It takes the place of the MAF housing intake temp sensor by cutting and connecting to those wires in the MAF harness. Originally my car ran fine but my husband thought that putting aviation fuel in it would make it run better and give it more hp, over the course of a few weeks my car began acting up and hasn't. you can use a MAF cleaner on a throttle body, but you cannot use throttle body cleaner on a MAF. So my MAF sensor is reading extremely low. 2003 Ford Escape Mass Air Flow Sensor Customer Reviews. 0 diesel e350 jericho941 IWI. Satisfactory and unsatisfactory MAF sensor frequency readings. The 4Runner uses a "Hot Wire" type. 4lb/min is about 2g/s i think, ive got stft around 5 and long term about 11% so now i replaced the faulty lambda and still have a high reading although very nearly right i think the car is running rich because the ecu is adding fuel as it thinks the car is running lean. With the J 23738-A or J 35555, apply 5 inches Hg (17 kPa) of vacuum to the MAP sensor. If you are cleaning the MAF sensor, then undo the 2 x 2. Then remove the two Torx head bolts using your Torx pattern driver. Bosch uses a hot-wire MAF sensor, which is a platinum wire heated to 212*F (some say 180*F) above ambient temperature. just because its bad doesnt mean it will set a code. 413 which is about as low a reading as it has given so far. Hook up a scan tool with the ability to monitor sensor valves (PIDS) and pull up the mass air flow sensor. A mass air flow (MAF) sensor responds to the amount of air flowing through a chamber containing the sensor. I did a few half throttle + runs and with 25+ psi of boost I was seeing a max of 37. Step 3 - Soak the MAF in Alcohol. but undriveable until I can get the part and do. You can usually tell if you have a MAP sensor if you cannot find a MAF sensor in the intake air tube before the throttle body. This test will help you check the condition of this wire. Record your MAF sensor reading at idle, and again at various RPM ranges. Where the MAF sensor differs and simplifies the process is that it does the work of several sensors by quantifying the actual mass of air flowing through the intake. A clean MAF sensor will keep your mpg at its optimum, while a dirty MAF sensor will decrease your gas mileage. Show Printable Version; 03-10-2014 07:48 AM #1. ) - Clogged up or improperly installed air filter - The mass air flow sensor element contaminated by excess oil from an oil-soaked air filter - Clogged-up catalytic converter or restricted exhaust Other possible. The Premier Gear PG-MAF10140 (around $69) is an affordable component that can help correct some of the causes of engine hesitation. An abnormal reading from a sensor can light up the Check Engine light on the dashboard, meaning that a trouble code has been stored in the computer. Performed leak test of Intake and Intercooler. 4 with a primary and secondary turbo arrangement similar to the 3. 22 g/s at 1. In vehicles that are turbocharged or supercharged, the MAP sensor also reads the amount of boost pressure. If the result shows that the Ox voltage is greater than 0. The pink EGR actual trace on the graph roughly follows the EGR specified trace. 80 volts at idle. com - UK Porsche 911 Resource Site & forum, Porsche Specialist, Insurance, parts, sales. Comments: HI,Been trying to get hold of info about MAF sensor technical data for BMW E46 325i sedanUK so to troubleshoot some performance issues but with no success. Two days later van had same starting problem and same dtc(1806 MASS AIR FLOW SENSOR SHORT CIRCUIT TO EARTH using ACR4) Thought maybe a faulty sensor and got a replacement under warranty,fitted it and all was perfect again for another two days. Start the engine and let it idle. The MAF sensor reads the amount of air coming into an engine. 2, MAF Rate - small change (~0. Our undercut ends give your silicon hose connection a cleaner transition; … Continue reading →. 7) to derive the total mass of fuel that has. 3 gallons per hour at tickover is more like it. What does a mass air flow sensor do? In a mass air flow system, the base fuel calculation is very simple. on the Mass Air Flow reading. If cleaning (only) is needed - then use a spray (aerosol) cleaner designated / formulated for mass air flow meters. Ensure you measure the I. 6-7 Volts ) If the MAFV reading is higher than 1 volt at idle then the MAF is faulty and must be changed. Some use MAP sensor for Barometric reading during key on startup. Step 3 - Soak the MAF in Alcohol. 5V when snapping the throttle open and closed. 45 volts (oxygen sensor resistance high), it judges that the air/fuel ratio is lean. This MAF sensor is mounted in the top of the air filter housing. It relays to the ECU the amount of air actually flowing in. Better idle with Mass Airflow Sensor unplugged. Oxygen Sensor. Works like a hot wire system, but adds a second cold wire to provide a baseline reading with which the hot wire’s reading can be compared. This MAP sensor is mounted directly to the intake manifold, but others might be connected by a hose. 15 at idle and the highest I've seen it go is the 1. 02 while using a scan tool. Unplug the MAF sensor's electrical connector. Easy way to test this theory, put a 0 in all the MAF scales and see what occurs. Took out the MAF, seems physically fine, but has no brand, the only markings on it is 101 101205, perhaps the previous owner replaced it?. If the reading for a given temperature is approximately that shown in the table, the IAT sensor is okay. As stated before, the Mass Air Flow Test is a very easy and simple test but there are a couple of things that. It is intended to be insensitive to the density of the air. One sensor measures the ambient temperature of the incoming air. Reproduced with permission from Fluke Corporation. Of -course, your car will adjust to faulty sensor readings, so gas mileage can also be caused by a bad sensor. The “air gulp” test uses a labscope to display the MAF output voltage increase during a snap-throttle test, and should show the voltage rising from about 0. In automotive applications, air density varies with. This indicates the power input to the sensor is correct. The 2,500rpm reading looks in the low side to me, I'd reckon on an air leak downstream of the MAF sensor or the sensor is under-reading. Mass Airflow Sensors. I have read that for the F-series it is supposed to be in the 4. The mass air flow sensor is designed to measure the amount of the air an engine takes in. Start the engine and let it idle. It should be roughly 30-45 psi and increase. JET Powr-Flo Mass Airflow Sensors will increase your engine's horsepower, low-end torque, and mileage by replacing the restrictive stock MAF sensor which. Often this happens when an old or improperly installed air filter allows some unfiltered air into the engine or when oil from an oil-soaked air filter contaminates the air flow sensor. Mass Air Flow Sensor Connector. The 89-93 Mustangs (and the 94-95’s as well as some ’88 MAF equipped Mustangs) will allow you to use a jump wire and count the check-engine light in the dash. 0 upgraded intake boot plug to aluminum and only affected early kits) After considerable testing, we have found it necessary to convert the 2000 S4 Bosch Mass Air Flow sensors (MAF) to the later 2001-02 Hitachi design. If the readings are highest at idle, look for a vacuum leak. Beginning in the late 80s, engines started to rely more and more on sensors and electronics to manage fuel metering, emissions, transmission shift. Changing the mass airflow sensor on an Audi is very easy and takes less than 30 minutes, even for beginners. Plus MAF on diagnostics is reading a very small amount with engine switched off. This means that your current MAF transfer will not be accurate for your new meter. Warning: When this patch is active the ecu will ignore the MAF sensor readings even if it's plugged in, so be careful and tune the ip_maf_1_diag__n__tps_av table very carefully before applying this. 5L,05-08 G35 3. – Subpar engine performance. 0's had MAF's for 03/04, then some 05's don't, but the rest of 05-07 does. 5 grams per second increments. Rather than calculating the air flow from the VE table and manifold pressure (MAP), the mass air flow sensor measure the amount of air directly. SLX 1999-1996 3. Turn the ignition switch to the Off position. 07 for lambda. Part numbers: AEM 3.