Random Engine Stumble, NO CEL
I just purchased a 2000 Impala LS (3800 Series II). Upon driving it much today thru my routine daily driving 3 (THREE) times accelerating from a light the engine coughed or stumbled making me think the engine was about to die, it did not, kicked and went on just fine. Engine idles beautifully, I've cleaned the TB and IAC. No CEL displays and most of the time runs beautifully but in nearly 70 miles of city driving today it worked great except those 3 times the engine randomly stumbled, kicked, coughed and then went on fine....... Ideas anyone??