Hey, I just got a 1991 camaro RS 3.1l from my Grandpa. and it's running strange at low RPM's. Ill be sitting at a stop light and it will run fine for half a min then you hear kind of a sputter sound that gets worse and worse till it seems like its gonna die, and when i accelerate it kinda jolts or feels like power goes away and comes back. it doesnt start to happen until it has warmed up or ive driven it like 4-5 MI. What could my problem be? sorry im not super Knowledgeable on this stuff as its my first car. but im learning. need help

Vacuum leak? Bad gas pump? Maybe something is clogged up?

Just my suggestions.

Thanks for the response. is there any possibility it could be the fuel filter, or injectors? it developed a new problem yesterday where when i started it it it really sputtered bad and almost didn't start, then the rpm's kicked up and it went back to normal. and did the same thing this morning. it was like 50 out so it was not that cold. plus the problems seem to almost go away when i have a completely full tank of gas then after i use like a quarter of the tank it starts up again. thanks for the help

I also put injector cleaner in when i got gas yesterday.