I have a 97 gmc sierra 1500 4.3L hestitation at idle and sometimes at first acceleration.
i have changed the O2 sensors, plugs wires cap and rotor, coil, checked fuel rail pressure and have done a vacuum test and still nothing. There are no codes and the CEL has never came on.
Any advice would help.
Friday, November 16th, 2012 AT 7:09 PM