Jan 23, 2012 · Testing to see if the MAF sensor on your 3.5L GM equipped car or pickup or SUV is bad or not can easily be done with a multimeter. In this article I'll show you how to do it in a step-by-step fashion... that will either condemn the mass air flow (MAF) sensor as bad or exonerate it. When you unplug the mass airflow sensor, the car goes into "limp home" mode in which it runs full rich. Generally speaking, if a car runs better with the mass airflow sensor unplugged than with it plugged in, the mass airflow sensor has failed.

Error Code P0103 is defined as MAF (Mass Air Flow) sensor or VAF (Volume Air Flow) sensor high input. The car just completely shut down going down the road at 40 mph. tried to hook it up to our diagnostic and it came up... 2000 Toyota Tundra still does not run after cha... I had a code reading of p0100/p0110, which indicates replacing mass flow air sensor or clean, after doing so it still... .

hey i recently pulled this code on my corolla i took to the dealer and they said that my mass air flow sensor was bad and i had it replaced. Well just the other day the engine light came on again and the same p0171 code came up. Was just wondering what to check next. Thanks

The car ran decent and one day my "Service Engine Light" came on and I started having major problems with loosing power and hesitation and generally just running crappy along with the millage going down to about 12 to 13 MPG. Jan 23, 2011 · I ve been reading and today tried to unplugg the mass air and run the car. To my suprise the car idled GREAT!! This was the first time since the new motor was installed in April. It idled @ about 850 rpm with the little rumble of the cam in it. I drove it to the gas stationed with it...

Apr 03, 2019 · Code reader finally indicated a bad mass air flow sensor. Bought this one at a good price for a non-plastic sensor. Much better power at cold start and maintenance light stopped coming on. Jun 11, 2018 · A MAF sensor needs to run properly because the ECU needs information about the amount of air in the engine. Fortunately, detecting bad MAF sensor symptoms is not rocket science. Just be alert for these common symptoms: 1. The car runs rich at idling or lean when running. Hot-wire MAF sensor is the most commonly used sensor.

My mass air flow sensor on an 88 Camaro 2.8 reads 5-volt reference between signal and ground while running and unplugged, on the ECM side, at idle. Shouldn't the mass air flow sensor dictate the voltage going out to the ECM? While plugged in, there is erratic non-detectable voltage, on/off, on/off. A Clean Mass Air Flow Sensor Tells No Lies (Article = By Mark Salem, Automotive Master Technician for CRC Industries Every sensor on or in a computer-controlled car or truck talks to the “on-board PC” in a kind of language you’ve never heard or seen. The mass air flow sensor senses the total amount of air passing the sensor and allows the fuel injection system to adjust the fuel mixture to compensate for cold weather and/or high altitude conditions. The MAF also incorporates an internal intake air temperature sensor which measures the temperature of the intake air. One other item of note, when it won't run right. If I have my MAF housing separated from the intake (no air flow through it), I can run the car with MAF plugged up. In this condition VCDS will show 0.0 g/s due to no air flow. As soon as I take the MAF housing close to the intake and it gets some air flow through it, it'll die. Mar 07, 2018 · It is important to complete the entire diagnostic process when diagnosing P0171. Many people will replace the air-fuel sensor or O2 sensor as soon as they get a bad reading, but the root cause is often a dirty or faulty mass airflow sensor or vacuum leak, thus causing the O2 or A/F sensor to read differently to compensate.

The mass air flow (MAF) sensor, part of your vehicle’s electronic fuel injection system, is responsible for calculating the total amount of air entering the engine. A faulty MAF sensor can cause your vehicle to run too rich or run too lean. You’ll notice if the tailpipes eject black smoke or when the engine runs rough or backfires.

Apr 28, 2012 · That code is related to the mass airflow, so I would so that's the problem. A bad O2 sensor won't really cause any drive problems because most cars are built to go into a "limp" mode when the O2 sensor doesn't work so it still drives fine just uses more gas since the car no longer can monitor the air/fuel ratio with out the O2 sensor so it puts in more gas then needed to be on the safe side. May 31, 2019 · Benjamin Jerew is an ASE-certified Master Automobile Technician with over a decade of experience in auto repair, maintenance, and diagnosis. In modern engines, the engine control module (ECM) measures or calculates air flow via either a mass air flow (MAF) or manifold absolute pressure (MAP) sensor. Turbocharged engines may use both, but ...

The Mass Air Flow (MAF) sensor plays a critical role within the fuel management system to ensure the ratio is correct. The MAF sensor monitors the temperature and amount of air entering your engine. This information is sent to the car’s computer which controls the fuel injection and ignition systems. Jul 20, 2010 · Start the car cold and listen to make sure the injector is clicking. If the enrichment injector is not working, then you certainly will not get the desired cold start enrichment. Proper Air Intake Metering. Next I would grab a can of break clean, and clean the throttle body, idle air control valve, and the Mass Air Flow Sensor (MAF) if equipped. Mar 11, 2011 · This is still of course with the maf sensor unplugged...if you plug it in while its running, after a few seconds it kills the engine. The car doesnt smell rich, and doesnt have any problems staying running with the maf unplugged. Going to do a little more digging then its off to the shop if I cant figure out why it will not run with the maf sensor When the OE fails, trust Standard | Comprehensive MAF sensor coverage | Premium quality

Oct 25, 2008 · However, The car will not run with the Mass Air sensor CONNECTED... If i disconnect it, she'll run and idle just fine (however once she warms up i have a rather nasty idle surge). I have no EGR stuffs hooked up, the sensors are there and plugged in, just no lines running to them. The car ran decent and one day my "Service Engine Light" came on and I started having major problems with loosing power and hesitation and generally just running crappy along with the millage going down to about 12 to 13 MPG. Feb 26, 2013 · A new "fancy" air intake may look better, but your car will run best if everything is factory specification and working as designed. As for an Intake Air Temperature Sensor, different temperature air ignites better or worse. The engine computer needs to know this information to adjust things properly. Jul 20, 2010 · Start the car cold and listen to make sure the injector is clicking. If the enrichment injector is not working, then you certainly will not get the desired cold start enrichment. Proper Air Intake Metering. Next I would grab a can of break clean, and clean the throttle body, idle air control valve, and the Mass Air Flow Sensor (MAF) if equipped. Mar 21, 2019 · This creates an issue because the sensor detects lesser air entering the engine than it actually is. It further leads to lesser fuel because the quantum of fuel injected is reliant on the reading of the mass air flow sensor. While one way to correct this is to take the sensor out and clean it up, a better idea would be to replace it altogether ...

Jun 05, 2012 · Suspected the mass airflow sensor so I changed it. Didn't fix the problem. The car idles rough and sputters, like a putt putt putt sound in the exhaust and smells like gas. When I unplug the mass air flow sensor, the car runs better. I checked all of the body grounds, and even changed the ground wire running from the mass air flow sensor to the ... One other item of note, when it won't run right. If I have my MAF housing separated from the intake (no air flow through it), I can run the car with MAF plugged up. In this condition VCDS will show 0.0 g/s due to no air flow. As soon as I take the MAF housing close to the intake and it gets some air flow through it, it'll die. Hasn't been running clean and smooth for quite a while and I couldn't find a problem. A couple weeks ago just by chance I checked The "Mass Air Flow Sensor". That was it !! Problem solved now it's running like new again. The mass Air Flow Sensor is located at the out end of your air filter cover. The thing is held in by two torques screws.

If the car run in the same way, or even better, you can be sure, the MAF sensor is gone. That’s exactly what I did and the car accelerate better without the MAF connected. Hurray, is not the turbo! The MAF is broke. The MAF, Mass Air Flow meter is the sensor who indicates to the ECU (car computer) the air mass who flow inside the engine. Signs Of A Failing Mass Air Flow Sensor Your Mass Air Flow Sensor (MAF Sensor) is a piece of technology within your engine which tells your car’s computer how much air is entering the engine. 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. I ended up taking the mass air flow sensor off, and cleaning it. I put it all back together plugged it back in, and had no changing results. Someone told me to unplug the mass airflow sensor and see if it made a difference. To my surprise it did to the point where this car had never idle better than that. A contaminated or failed mass air flow sensor cannot measure the amount of air flow correctly. This causes the engine computer to miscalculate the amount of injected fuel. As a result, a bad mass air flow sensor causes various driveability problems, including a no-start, stalling, lack of power and poor acceleration.

Jul 20, 2010 · Start the car cold and listen to make sure the injector is clicking. If the enrichment injector is not working, then you certainly will not get the desired cold start enrichment. Proper Air Intake Metering. Next I would grab a can of break clean, and clean the throttle body, idle air control valve, and the Mass Air Flow Sensor (MAF) if equipped. If you remove the mounting bolts and wiring harness, you can remove the entire mass airflow sensor unit and open it to expose the sensor. The sensor is a small unit with two exposed wires; the wires heat up when the car is running, and the MAF measures the airflow by detecting how quickly the flow of air cools the temperature of the wires. Dec 28, 2009 · If you unplug the maf the car switched to map based mode and reads air quantity and calculates the amount of fuel to be delivered by the pressure in the system. The map sensor is mounted on your throttle body pipe. so if the leak is before there and after the maf this is why unplugging it would help.

Jun 05, 2012 · Suspected the mass airflow sensor so I changed it. Didn't fix the problem. The car idles rough and sputters, like a putt putt putt sound in the exhaust and smells like gas. When I unplug the mass air flow sensor, the car runs better. I checked all of the body grounds, and even changed the ground wire running from the mass air flow sensor to the ... Nov 08, 2018 · Mass Air Flow (MAF) Sensor. This sensor works along with the oxygen sensor to make sure your engine has the right fuel ratio. While the oxygen sensor is in the exhaust system, the mass air flow sensor is located near the air filter and monitors how much air is flowing into the engine.

Mar 21, 2019 · This creates an issue because the sensor detects lesser air entering the engine than it actually is. It further leads to lesser fuel because the quantum of fuel injected is reliant on the reading of the mass air flow sensor. While one way to correct this is to take the sensor out and clean it up, a better idea would be to replace it altogether ... The car ran decent and one day my "Service Engine Light" came on and I started having major problems with loosing power and hesitation and generally just running crappy along with the millage going down to about 12 to 13 MPG. Signs Of A Failing Mass Air Flow Sensor Your Mass Air Flow Sensor (MAF Sensor) is a piece of technology within your engine which tells your car’s computer how much air is entering the engine. 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. Car runs with the mass airflow sensor unplugged. If you plug it in it will die if the car is running. If you unplug the mass air flow sensor the car will start. If you try to plug it in while it's running the car will die. My car has 90000 miles. My car has an automatic transmission.

Car runs with the mass airflow sensor unplugged. If you plug it in it will die if the car is running. If you unplug the mass air flow sensor the car will start. If you try to plug it in while it's running the car will die. My car has 90000 miles. My car has an automatic transmission.

Apr 28, 2012 · That code is related to the mass airflow, so I would so that's the problem. A bad O2 sensor won't really cause any drive problems because most cars are built to go into a "limp" mode when the O2 sensor doesn't work so it still drives fine just uses more gas since the car no longer can monitor the air/fuel ratio with out the O2 sensor so it puts in more gas then needed to be on the safe side. Feb 26, 2013 · A new "fancy" air intake may look better, but your car will run best if everything is factory specification and working as designed. As for an Intake Air Temperature Sensor, different temperature air ignites better or worse. The engine computer needs to know this information to adjust things properly. Car runs with the mass airflow sensor unplugged. If you plug it in it will die if the car is running. If you unplug the mass air flow sensor the car will start. If you try to plug it in while it's running the car will die. My car has 90000 miles. My car has an automatic transmission.

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In fact, the old O2 sensor was one of the first ever used to electronically modulate the ratio of fuel and air used by the engine -- in a time even before what we would recognize as fuel injection today even existed. Surging is among the many problems a failing O2 sensor can cause, but it isn't the only one. Jan 23, 2011 · I ve been reading and today tried to unplugg the mass air and run the car. To my suprise the car idled GREAT!! This was the first time since the new motor was installed in April. It idled @ about 850 rpm with the little rumble of the cam in it. I drove it to the gas stationed with it...

Apr 27, 2018 · Since fitting an air intake tube and MAF sensor in a retrofitted engine bay is often difficult, many aftermarket EFI conversion kits rely on speed density systems. (Image/FiTech) If you’re researching electronic fuel injection (EFI) systems, you’ve probably come across the terms speed density and mass air flow (MAF). Mar 16, 2017 · The BAP will affect air/fuel ratios and EGR flow. This sensor will force a code 22 if it fails. Vehicle Speed Sensor (VSS) This sensor is located at the business end of your speedo cable at the transmission. Keep in mind on Speed Density with no cruise control option will NOT have this sensor (which is why you have to install one for a MAF ... Error Code P0103 is defined as MAF (Mass Air Flow) sensor or VAF (Volume Air Flow) sensor high input.

Poor engine running at idle and/or surge Excessive vibrations when stationary RPM’s changing noticeably without driver input. How to troubleshoot a MAF sensor – a technician’s checklist. 1. Check the connector for a correct fit and good contact. 2. Check the mass air flow sensor for damage. 3. Check the measuring elements for damage. 4.

Nov 29, 2019 · This means that if your mass airflow sensor dies completely, then your car will stay running and surprisingly the car might run better without the mass airflow sensor. That is because if the sensor is bad or giving a wrong reading, then the cars guess might be closer to the actual amount of air that the engine is getting giving you a more accurate fuel mixture. Sep 04, 2019 · If the misfire is not specific to one cylinder, it’s likely because the engine is not getting enough air or fuel to run properly. That could be because of a failing part of the fuel system. If the mass air flow sensor or oxygen sensor fail, they could give incorrect data to the engine’s computer, causing a misfire.

I check under the hood and notice the mass air sensor is unplugged. I shut the car off, plugged it back in and tryed it again. Runs like crap again. So I drive halfway home, still running bad. I pull over and unplug the mass and drive it home (3 blocks, NO BOOST!!!) and it runs better than it has since i baught it (2 weeks ago) Question are:

If you believe your car has a faulty mass air flow sensor, take it to a qualified mechanic so that a complete computer diagnostic can be run. In most cases, a faulty mass flow sensor has a specific code that will generate during computer diagnostics, and is usually easy to determine with computer testing equipment. Mass Air Flow Sensor 2011 Nissan Murano. I received the mass air flow sensor whits scuff marks as described. I replaced it and the engine light was still on. So I disconnected the negative terminal from the battery and hit the brake 3 times (to drain what ever power in the car). I reconnected the battery, started the car and the engine light ...

Oct 26, 2008 · I have a 01 grand prix gt 3.8 n/s. i have a code for mass air flow sensor it runs better if unplugged but my question is can i drive with it unplugged for like a week until i get the cash or should i just leave it plugged up. also i noticed my wheel senor on my passenger side is caught up by the axel causing my abs/trac light to stay on can i just replace the sensor or can i leave the one i ... Air Flow Rate From MAF-- The airflow rate as measured by the mass air flow sensor. Absolute Throttle Position-- The absolute throttle position (not the relative or learned) throttle position. Usually above 0% at idle and less than 100% at full throttle. Calculated Load Value-- Indicates a percentage of peak available torque. Reaches 100% at ... Dec 17, 2016 · Unplugged the MAF sensor with no change? xkatie Kronicx. ... What happens if you start a car without the mass air flow sensor connected ... Golf Mk4 1.8T 20V running with MAF plugged in ... .

Dec 13, 2012 · O.k.,one very common issue on this vehicle is the intake gaskets.These gaskets would shrink over time and on a cold start this would allow excess air to enter the engine unmetered by the mass air flow sensor and cause rough running until the engine had warmed up some as the gaskets would expand with the heat from the engine and seal up again when warmed up. 85-89 MAF TPI Systems Below is a list of all the needed sensors to install a MAF TPI setup, and each of their functions. Mass Air Flow (MAF) Sensor: This sensor is responsible for measuring air volume and density. Mass air flow sensor bad? Discussion in ' ... especially if running an aftermarket cold air intake!! If there aren't any wires broken on the MAF, I'd go to the auto ...