Engine Performance problem
1988 Chevy Silverado V8 Four Wheel Drive Automatic 201000 miles
My truck has a intermittent rough Idle. The Idle will be steady then it will drop, get rough, speed up then return to steady. When I am on the road for 40 minutes plus at a higher rate of speed (55mph)the service engine soon lite comes on. I stop the truck, shut it off, turn it on and the light does not come back on. The service engine soon lite otherwise does not come on. When I am driving it, if I press hard on the gas for 3-4 seconds then let off it will sometimes back fire. It has a rougher idle when the truck is in gear than out of gear. When going slow (10mph) and running steady, but when I let off the rpms dip hard and it sounds like it could die but then it comes back to steady or slightly rough.
have the same problem?
Monday, September 20th, 2010 AT 1:01 PM