Hi new to this site i have a 91 gta 305 it started after a boost dead battery was running fine put in the shop did some work on it new plugs brakes tires a new battery now the car misses on driver side have spark and manifold turned cherry red ive cheaked all i know feul pressure cap roter plugs its my first tpi car always had older carbed cars any help would be appreciated thx

 

Sounds like you mixed up a couple of plug wires or they are not seated all the way. We've all done it before.