I have a 1998 Chevrolet Blazer 4.3 that is idling rough never stalls, runs fine on highway replaced plugs, wires, filters checked egr valve, IAC was checked. no service engine light, codes shows mulitable misfires on cylinder 4 & 6 compression checked fine I think shop said it was 160 psi any ideas?
Apr 8, 2009 at 8:45 PM