My GMC yukon runs rough at low RPM such as when I come to a stop. Engine RPM drops to around 400-500. Engine shakes as if miss firing or about to die. No check engine light appearing.I had check engine light in past. Cant remember codes but they said (engine lean Bank 1& 2). I changed mass air sensor and put engine treatment in fuel tank a couple of months ago. No problems until yesterday. I was told in past it could be a bad intake gasket also. I have appointment at dealer Monday. Do you have any suggestions??? Please HELP.
Jan 31, 2009 at 6:26 PM
