i'v got an 85 iroc-z with tpi and the engine will cut off after i'v been driving on the highway for a while and come to a stop but stop and go is fine. any ideas?

 

Doesit cut offmomentarily, or does it force you to pull over and restart the vehicle? Any check engine light?

 

i have to stop and start it again, no check engine light, engine runs fine...i was told it was the pcv vavle so i replaced it and the hose, but the car did the same thing.

 

Make sure you don't have a sticking throttle valve, and that the IAC valve is working OK, also check setting of TPS.

 

check starter wire from batt too

 

Does your voltmeter on your dash show 14v when this happens or no? If not I would check your batt and alternater connects maybe even load test your batt and alternator

 

this happend to me when i first got my car. replaced my air filters and it hasnt happend since. dono if that would be your problem but thats one of those stupid little things you think about AFTER you toss a ton of money into the car trying to fix crap.

 

I know that this wont help at all but my 87 IROC dida very similarthing. I took it to several shops and no one could figure it out. What it ended up being was retarded, the steering colum was loose and it was walking back the key.

 

i think it may be the smog pump not being hooked up...i'll replace it and see if its it.

 

not the smog pump...