hello forum first timer i have a 95 camaro 3.4l and it wont stay started. there is a pulse triggering the transmission, fuel injectors, and the air pump relay. when i try to start it, it backfires and shuts off. some times it starts up smooth for a second then turns off. tried a working pcm tested tps, iac, got spark, got fuel. got no hair left please help

 

Welcome. I'm going to move this to the appropriate section so you can get the help you need

 

have you been able to have the computer scanned for trouble codes? that would be a good first step. its backfiring so it is obviously getting spark, just not at the right time. is it backfiring through the exhaust or is it comming out the throttle body?

 

backfires thru intake, also when i disconnect the iac the pulsing stops. also thanks for moving this to the right area. cam sensor not sending signal to computer? could this be it? u got a bad ride there craby.

 

going to check codes today

 

yes i believe the cam sensor is the important one and the crank sensor is for diagnostics.

 

glory hallelujah!!! took to mechanic. found wire harness for top of engine sitting on the exhaust manifold. few wires burned together. repaired and/or replaced now car runs fine thanks for your input.