Engine Mechanical problem
1995 Pontiac Grand Prix 6 cyl Front Wheel Drive Automatic 167000 miles
1995 pontiac grand prix se 167000 miles 3.1 3100 V6 engine. Car started running rough, idles rough starts but runs very rough like a possible cylinder misfire but unsure. No check engine light on so difficult to diagnose. Seems to be a strong fuel odor coming from engine when you start it, from rear of engine. Pulled the plugs cylinder 4 plug seemed wet with fuel. Replaced plugs with new ac delco and plug wires still runs rough. Checked for vacuum leaks and tried replacing fuel vapor canister solenoid. Still runs rough. Tried replacing EGR valve did not help then tried replacing complete coil pack and ignition module with a replacement from a auto salvage place. Still runs rough. I am puzzled got any ideas?
Monday, February 22nd, 2010 AT 9:08 PM