car is a 93 trans am lt1 a4 car with about 108k and some change on the clock
car was sitting for about 3 weeks (due to money problems) and just got it all back together yesterday

Story - Replaced the opti, water pump, radiator, plugs, wires, got it all back together yesterday and it ran perfect no hesitation started right up perfect just like a brand new car. Well today i go out to check and bleed the cooling system and everything ran good until the car got to operating temp where it stumbled, hesitated, and now the car won't even fire.??? So i am asking people what could be going wrong here. Fuel pressure is good filter is good the intake boot is on and sealed up good. so i'm not sure whats goin on because i know the ICM and coil are good because it ran perfect yesterday but today i have no idea whats goin on ... help me please i can't figure this out

 

when u bled the system did any coolant happen to get onto the opti if it did the opti is prob shot.

 

I just replaced my opti also. You cannot get any liquid whatsoever on the opti or it will crap on you. Check your wiring harness to the ICM and coil for continuity. If you have an msd box , make sure it didnt take a dump. If your opti is vented, ensure the vacum hoses are attched. Check to see if you pluged the pigtail into the opti completely and where the pigtail connects to the harness up by the intake manifold.

 

I got instructions on how to convert your old nonvented opti into a vented one that's just about submersible if you guys want em. I bled my cooling system all over it and it's airtite and healthy! It's not hard and the venting sure makes me sleep better at night. Shouldn't need an opti for a long time!

mudkat