In the morning i will start up my car and let it warm up then i will start driving then when i get on it (stock engine) and then let off of it the check engine light will come on. Then at a stop light or something i will go normally and then give it gas the car will seem like it isnt getting enough or getting too much fuel. this only happens up too about 3500 and then it goes normal. Can anyone tell me what this is or how to fix it.

 

had that problem b4 too.. i dunno what to say but try whati did.. 1st off u dont put am pm in there do u? lol if so thats your your problem.. if u put any gay gas in there then do this.. run ur car till almost all ur car is completly gone.. then goto the nearest chevron get a big black circle tube looking thing its fuel injection system cleaner stuff.. ut it in before you pump your gas and fill your gas to the limit.. ater the new gas ciculates and old gas goes away it should be fine.. (1-3 days) but i dunno if thats the case..

 

what is am pm?

 

Check all your grounds!!! I had the same problem, and it was a loose ground. The one on my engine that was loose was the one on the main harness. Near the thermostat it extends from the main harness to the engine block.

-Jake

 

cool thanks for the help im going to go check all of those right now. thanks for the help