Hi everyone my name is Don, i'm new here i have a 87 iroc with 350 tpi with maf. runs fine when cold but after it warms up falls flat on its face with a slow rough idle. it stumbles at part throttle but at w.o.t it comes to life. it also runs fine for about 30 seconds after starting when warm and then problem persists. very confused please help!

 

Welcome!! When it runs does your check engine light come on? Maybe take it somewhere to have it scanned. It could be something simple like the timing, or maybe some spark plugs.
Id have it scanned to see whats going on.

 

Hows your oil just a question.

 

I'm getting the same problem, oil and other fluids are fine, but same problem happens.

 

I figured out that my ignition module was bad because it started misfiringwhen cold and had a hard time starting. I still have hesitation but it is not as bad. I have no check engine light but i just found out I have no bulb in it so im getting a bulb and trying it to see what codes flash I will update thank you