Hi i am new to this site and my 1994 chevy c 1500 is idling rough. I ahve replaced the coil and cap,plugs, wires and distributor and the fuel pump and fuel regulator plus the map sensop tp sensor and egr sensor idk what else it could possibly be. Any advice would be greatly appreciated hanks.

 

do a compression check, and look at your oil, is it milky? could be a cracked head or burnt valve.