Sunday, October 08, 2006

Multiple engine light codes and engine hesitates, cutting outs for 1997 Camaro with 5.7L engine


My engine is hesitating and cutting out with check engine light on. Got codes for oxygen and egr which were both replaced. Despite these, the engine kept having poor pick up and stalls. I am thought cleaning the MAF sensor would fix this problem but no change either. I am at a loss and contemplating to replace the engine computer (ecm). Please help.

ATS Advisor:

If I am not mistaken, this engine came with both MAP and MAF (mass air flow) sensors and although you cleaned the MAF sensor, you may not have it tested properly. A quick way to do it is to unplug the MAF sensor and see if the problem stops. If it does, replace the MAF sensor.

ATS Tips:

When you disconnect the MAF sensor, all the loads of the engine is calculated by the ecm using the MAP signal and MAF readings will be set at default instead of the actual MAF signal.

Another indicator of a bad MAF sensor is dirt built up in the air filter which contaminates the MAF sensor wiring elements. When in doubt, replace the MAF sensor if you see a dirty air filter.


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