88 GTA my car idles funny when at red lights, wants to stall, idle jumps up goes down, did full tune up, the injectors i think are next to replace, anyway

my check engine light came on last night and the car ran excellent, like never before, went to meet someone, and i hated to turn it off cause i knew it would reset, after that it ran crappy again got no codes from it either. wish i knew the problem

 

Have you had a chance to check your vacuum lines? If there's a leak somewhere, it may be whats causing your problem. I'd recommend throwing on a guage and seeing if its jumping up and down or staying constant