Engine Performance problem
2005 Chevy Tahoe V8 Four Wheel Drive Automatic 66650 miles
Tahoe is running very rough at idle, almost stalling. Check Engine light is on, Onstar Diagnostic says to have car serviced, emissions control error. Actuall codes are P0151, P0174, P0300. Replaced plugs (AC Delco), Wires, and new Interstate battery. Added fuel injector cleaner. Only 66650 miles, passenger side plugs were all fouled, driver side normal deposits. Still running rough with " rotten egg" smell from tailpipe at idle. Runs fine at speeds above 20 mph.
Any suggestions before I bring to dealer? Warranty is no longer valid, but have a engine and transmission warrantly thru original dealer in CO, vehicle in WY.
Monday, January 5th, 2009 AT 11:36 AM