Hi guys I am a newbie to the site, I just picked up a super clean 91 gta it has @ 124,000 mikes on it. the problem I am having is that after the car reaches operating temp it begins to run poorly under acceleration, spitting and popping and acts like it is starving for fuel. The car just had the fuel pump,and injectors replaced as well as the dist rebuilt new msd 6al and blaster2 coil. The previous owner got tired of putting money into it and was disgusted so the price was right. I want to get this on the road/track asap but I need to figure out what the deal is before tagging and insuring. also NO check light HELP!!!!!!!!!! Any help is tremendously appreciated

 

I'm assuming that the wires and plugs were replaced, right? Plugs are a pain and most people will pull one and declare them good.
Need to know what engine is in it.
A few things come to mind (in order of commonality):
Stopped up cat.
Worn TPS.
Slack in timing chain.
Bad O2 sensor.
Internal engine wear (valves).

 

Thanks for the reply, car has a 350 tpi. cap ,rotor,plugs and wires were replaced at time of distributor rebuild. Cats have been gutted.

 

What size injectors were put into it?
"when warmed up" kinda makes me lean towards the O2 sensor.

 

I would assume they are stock replacements

 

I would have to say it is the 02 sensor based on what you described