Engine Mechanical problem
1997 GMC Sierra V8 Two Wheel Drive Automatic 146000 miles
our GMC is running rough and when you accelerate quickly it spews black exhaust. Also the service engine soon light is on. The O2 sensors have been changed and if the engine gets a long use (long trip) then it goes off, but as soon as we travel around home for a little while it starts again.
Any suggestions on what can fix the problem and if it will damage the engine to continue to drive while running this way?
have the same problem?
Saturday, October 9th, 2010 AT 3:39 PM