Question about 1997 Subaru Legacy

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My Subaru? Hi, I replaced the plugs and wires today. None of the plugs had a white film on them... The car keeps sending the code for a mass air flow sensor which I replaced two days ago. I took the car to a shop and had it looked at by a tech and it said the mass air flow sensor was receiving "high input". I have come to the conclusion that I installed a faulty mass air flow sensor. The car runs really rich and want to stall when idling at a stop light. When sitting at a stop light the car will range from 300-1800 RPM. Have you ever seen anything like this? Thank you very much for your time!

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  • jdaniels1268 Dec 10, 2008

    hi i have a subaru that has the same problem just alot worse. the car is choking itself out, or trying to. but mine fully dies every time i put in the clutch or stop and i have to restart the car. there are floats in the carborator that are getting stuck and so yopur flooding the car. check your are flow system the filter and everything and any sign of gas on it is a sign for that. the gas cant go anywhere because the floats are not moving so it goes up into the air system your problem i dont think has gotten that far yet. sometimes carborator/fuel injection cleaner will help fix it or open up your carborator and clean it out yourself. the type of gas your using can be due to this. i hope that helps you at all. mine i have to get a new carborator for mine it got so bad.

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I would say that the sensor may be bad the only other thing that i can think of is that the PCM lost its idle settings. then it is trying to relearn the idle setting and adjusting for the air sensor and/or the O2 sensor.

Posted on Oct 11, 2008

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Posted on Jan 02, 2017

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Ok, i have a 2000 sierra 5.3 slt got the p0101 code it wouldnt star up unles i give it some gas and it shots off so, rough idle and wont stay on, i change the MAF sensor (new delphi) but still doing the...


The Mass Air Flow (MAF) sensor is located in the stream of intake air and measures this intake flow rate by measuring a part of the entire intake flow. It is what they call a hot film and is supplied with electric current from the Engine Control Module (ECM).
The temperature of the hot film is controlled by the ECM to a certain extent. The heat generated by the hot film is reduced as the intake air flows around it. The more air, the greater the heat loss. Therefore, the ECM must supply more electric current to maintain the temperature of the hot film as air flow increases. The ECM detects the air flow by means of this current change.
The OBDII people suggest that before you replace the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with compressed air or by using a cleaner on the mass air flow sensor. Truly, all that may be wrong is a build-up of dirt.Unfortunately, in your case, replacing the Mass Air Flow did not work.After replacement, did you reset the code and drive the vehicle?.
I suggest you replace the air filter and check for intake air leaks.YouTube has some good videos on how to do this, one by Eric the car guy and one by Scottie Kilmer https://www.youtube.com/watch?v=9CPqbaSgcokhttps://www.youtube.com/watch?v=zMok2y05jNE

Jan 13, 2015 | 2000 GMC New Sierra 1500

1 Answer

1999 chevy camaro starting problem? help


check that fuel is getting to engine, next, are you getting spark, are your plug wires in the right order, are they all good, you must keep plug wires from touching each other, is the cap & rotor ok, coil ok, fuses ok, do you have a fuel pump relay, if so, check fuse in relay. is the fuel filter new, did any codes get stored ECM, put drygas in fuel tank. are spark plug wires fully engaged onto plugs, don't concern your self with any smoke, let's get the engine started first, CHECK EVERYTHING MENTIONED ABOVE, including fuel filter, air filter should be new also, todays fuel w/ ethanol is garbage, for older cars. is the mass air flow sensor for this car ? aftermarkets are garbage. let me know how things work out, my knowledge is not cheap, but I will help you to avoid egg on your face, KEN

Feb 05, 2013 | 1999 Chevrolet Camaro

1 Answer

2003 Grand Am Has P0102


It is not an ECM/PCM problem.
P0102 - Mass or Volume Air Flow Circuit Low Input
Possible causes- Faulty mass air flow sensor
- Dirty mass air flow sensor
- Dirty air filter
- Mass air flow sensor harness is open or shorted
- Mass air flow sensor electrical circuit poor connection
- Intake air leaks Tech notes Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner. Reset code and drive vehicle. If the code comes back, it may be necessary to replaced the mass air flow sensor

Sep 27, 2012 | 2003 Pontiac Grand Am

1 Answer

P0121


Hi there:This code can also be related to the MAF or mass air flow sensor. Lets test it before we try anything new.
Testing and Inspection:
8_16_2012_9_45_44_pm.gif



MASS AIR FLOW SENSOR (MAF SENSOR)
This hot film type air flow sensor is composed of a hot film sensor, housing, and a metering duct (hybrid, sensor element). The mass airflow rate is measured by detection of heat transfer from a hot film probe. A change in the mass air flow rate will cause a change in the amount of heat being transferred from the hot film probe surface to the air flow. This results in a change in temperature of the hot film probe and a change of resistance.


Circuit Diagram:

8_16_2012_9_47_04_pm.gif

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Aug 16, 2012 | 2001 Hyundai Elantra

1 Answer

P0101


Here is the definition of the code.

P0101 GMC Description The Mass Air Flow (MAF) sensor is placed in the stream of intake air. It measures the intake flow rate by measuring a part of the entire intake flow. It consists of a hot film that is supplied with electric current from the Engine Control Module (ECM).

The temperature of the hot film is controlled by the ECM acertain amount. The heat generated by the hot film is reduced as the intake air flows around it. The more air, the greater the heat loss. Therefore, the ECM must supply more electric current to maintain the temperature of the hot film as air flow increases. The ECM detects the air flow by means of this current change.
Faulty mass air flow sensor
- Intake air leaks
- Dirty mass air flow sensor
- Dirty air filter
- Mass air flow sensor harness is open or shorted
- Mass air flow sensor electrical circuit poor connection
Read more: http://engine-codes.com/p0101_gmc.html#ixzz223ibNx6t

Read more: http://engine-codes.com/p0101_gmc.html#ixzz223i9HR3J

Jul 29, 2012 | 2002 GMC Safari

1 Answer

My chevy blazer 2000 ha a p0101 code changed the mass air flow sensor still does not want to accelerate


Hi there:
This code is set when the MAF (Mass Air Flow) meter is not sending the PCM the correct information. This can be due to a bad conection of the rubber intake hose between the MAF and the Throttle plate opening, a dirty air filter, a dirty mass air flow or a bad mass air flow.



Most programmer have you tie into the iat sensor in the mass air flow. this can cause the the iat sensor oto short out.


Hope helps.

Jun 20, 2012 | 1998 Chevrolet S-10 Pickup

1 Answer

I have a 1998 Subaru Forestor and recently it started chugging here and there when I gas it. The check engine light comes on and sometimes goes off. I had it plugged in and the codes said...mass air flow...


did you in fact replace the O-2 sensor as well?
What about the ignition coil - have you tested for ohms resistance? (in particular cylinder #3)
the coils are relatively inexpensive, and easy to test for sure. I think it is 10 ohms or less if I recall - similar with the spark plug wires... check those as well - they may be compounding the problem..
One last thing - check to be sure the spark plugs are all the way tight in the cylinders...
Best regards
Ck

Mar 07, 2011 | 1998 Subaru Forester

2 Answers

Code reading


Hi. this code represents an issue within the mass air flow sensor. it is malfunctioning at this point. the mass air flow sensor Measures the volume and density of air entering the engine, so the electronic control module can determine how much fuel is needed to maintain the correct air to fuel mixture. There are two basic types: heated wire and heated film (grid); both work on the same principle.

A faulty MAF will cause driveability problems resulting from incorrect ignition timing and improper air/fuel ratios.

this device is located Under hood, center, upper engine area, mounted on rear of air intake duct


To replace a MAF sensor:
  • Locate the sensor.
  • Disconnect the negative battery cable.
  • Unplug the wiring harness and vacuum hose.
  • Unscrew the two screws holding the sensor in place.
  • Reverse the procedures to install a new sensor.
Please rate and god bless:)


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1 Answer

2002 Kia Sedona- Mass Air Flow Sensor problems


i had the same problem my car keep seting the code for the mass air flow sensor. i put on 3 of the. and it was not the mass air flow sensor. i had a bad set of plug wires that was making the car set a mass air flow sensor code. my car fine now after a year. make you sure you use kia plugs. if you need anymore help let me know.

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1 Answer

Cylinder 1 misfire on my subaru!!


What you should check first is the spark plug for the #1 cylinder and see if there is a white film on it this would be a sign of a coolant leak which would cause a problem with the O2 sensor

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