Ok so I just bought this 86 iroc for 2200 bucks, and it needs some work. I hope I don't have to play musical sensors for this current problem:
Engine fires up great first of all, hot or cold. When it's cold it fires up and stays running well, rpm's are high until it warms up, and runs very smooth in general. No leaks, no oil burning (just a freakin exhaust header leak). I shut the motor down. Before the engine cools down I start it back up and it fires up, yet it just shuts right off after. I have to keep my foot on the gas very very slightly to keep it running the whole rest of the way home. Wierd!!! It probably needs a tune-up very badly, but with it running so decent at first, and then not running as well after I shut it off and restart it makes me think it's sensor related. Any ideas fellas? Thanks for any help!! I'm going to change the cap/rotor/wires/plugs/air filter/oil this weekend and see if it keeps playing games.

 

clean and reset the IAC ..... just one of MANY possibility's

 

I'll check it out this weekend. How do I reset the IAC anyways? I've done some looking around and it looks like I have to have a scanner? Thanks

 

When you have to keep your foot on the gas to keep it running, is it running rough? I just had a similar problem on mine and it turned out that the pickup coil would work correctly when cold but after it got hot, it wouldn't work. Replaced it and it runs fine.
It's not too tough to check if you have a multimeter. Like earlier stated, just one of MANY possibilities.

 

I just bought a new IACV and coolant temp sensor so I'll be changing them this weekend with the other usual tune-up stuff. The engine runs very good when I have to keep my foot on the gas. I can place my foot on the pedal at a stoplight just slightly and get it to idle pretty much normal, though it's hard to tell thanks to the tach reading 7K all the time for whatever reason. Yet if my foot comes off that pedal it just winds right on down to nothing. i hope the IAC does it. I just ordered a shop manual for the car so hopefully that helps!

 

I think that eliminates my idea....that's a good thing though, in my eyes. Hope you get it running right.

 

The throttle body was totally clogged with crap. The IAC was caked with tons of crap. Cleaned out the throttle body, changed the IAC (and CTS) and it runs awesome. Thanks for the help fellas!