We just bought a 1985 IROC and drove it back 7 hours. It ran fine most of the trip on the highway, but it seems that around town the car will miss (sputers when revving it up) it also is idleing really low when its warm like 500rpm and below and as a result sometimes it will stall. Any idea on whats going on? I know the wires cap and rotor are new not sure about the plugs I am going to change them today. TIA

 

I would check the timing too.