Engine Performance problem
1994 GMC Truck 6 cyl Two Wheel Drive Manual 320, 00 miles
I also have a PU that had the same problems as the Sable. It all started with bad gas. Anyway, I also changed the plugs in my truck, today, because it was coughing and backfiring, and now, I can't get up any speed. It sounds like a machine gun and won't get over 40 mph. It's a 5 speed and I didn't have THIS problem before changing the plugs. Did I do something wrong?
Friday, July 9th, 2010 AT 9:02 PM