Question about 2007 Fiat 124
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Posted on Jan 02, 2017
SOURCE: Check engine light
Those codes do appear to deal with the mass airflow sensor. The MAF sensor is probably the "hot wire" type where a thin wire is suspended inside the body of the sensor and is heated with electrical current. The amount of air passing over the wire is directly proportional to the resistance of the wire and that resistance data is calculated. The MAF sensor, by itself, cannot determine the air mass supplied to the intake plenum. One or more other sensors are used in conjunction to equate these values. The oxygen sensor(s), Manifold Absolute Pressure (MAP) sensor, the Intake Air Temperature (IAT) sensors may all play a part in this fault reading.
There are reliable methods to test the MAF sensor. One well takled about method is to tap the MAF sharply with a screwdriver handle while the engine is running. If the engine dies, the MAF is faulty. This can detect a physical defect in the wire and a few other things but do do assume that, after repeated blows to the MAF with your dead blow hammer for good measure, that the MAF is at 100%. I will research some text on testing these sensors on that particular model and post links to any information and diagnostic data I find.
Posted on Jun 04, 2008
SOURCE: MAF Sensor and 02 Sensor
Replace the fuel pump with another one.
This is a common issue.
Don't use an "aftermarket" pump; buy one from Chevy.
I just had this exact same issue in my shop. The truck would run for a bit, and then just stop. I had the truck towed in, and the fuel pressure was good. Drove it for a while, with the gauge hooked up and taped to the windshield, I could see the fuel pressure start to drop off. I told the owner that she needed a new fuel pump.
The owner told me that the pump was 2 months old. I went ahead and changed it anyway. A new fuel pump cured the problem.
Testing the MAF and the O2s is not going to tell you anything. A failure, an open or a short would set the check engine light.
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Posted on Jan 25, 2009
SOURCE: need to know what MAF means.
HI. this means Mass Air Flow sensor. It is attached to the air cleaner assembly. it simply observes the airflow that is being fed into the intake manifold.
Posted on Apr 13, 2009
i guess you got a chip then, look at the cover ithink 3 or 4, circles, fine screw driver and pop em out to see the 10mm nuts.
Posted on Aug 15, 2009
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