I just bought my first tpi camaro. had everything else but i could never get my hands on a tpi. the car sat for over a year with gas in it. car starts if i keep hitting the gas , then eventually it will idle stumbling at first then its ok.just check the dervice engine codes got 15,33 not sure exactly what they are. i did the tune-up, oil change. i had had it running for 2 hours straight, but still after running it wont start up unless i hold the pedal to the floor, then rev it as it stumbles to get it to idle itself again. i have no clue about tpi being that its my first one and i can't rest until i figure it. if anybody has any clue whats going on please let me know. also if i take out a spark its completly wet with fuel.

 

Check your fuel pressure, But it sounds like you have a leaky fuel injector....or more then one.
I had the same problem with mine. Plus it was blowing black smoke out the exhaust. I had 5 bad injectors. They were just dumping in the fuel.

 

How do you check the fuel injectors?

 

i want to know this answer also. i have white smoke coming out the exhaust always at start up and under heavy acceleration. can u fuel pressure test determine if a injector is bad?

 

White smoke... you sure you dont have a blown headgasket and youre burning coolant off? Extra fuel makes black smoke. Oil makes blue smoke, coolant makes white smoke.

 

bad coolant temp sensor making the car run pig rich? Common tpi problem...