Anyone have any ideas what could be causing my 2002 GMC Yukon to misfire at idle. I have.
1. Replaced sparkplugs and wires.
2. Replaced a blown intake gasket (Dealer notided it while troubleshooting).
3. Replaced the fuel filter and air filter.
4. Replaced the throttle body, PCV Valve, and the IAC valve.
The problem seems to go mostly away after overdosing on fuel additive/injector cleaners. Could it be the injectors even though it only does it at idle?