Engine Performance problem
1999 GMC Sierra V8 Four Wheel Drive Automatic 135k miles
I have replaced air filter, all 4 o2 sensors, TPS, fuel filter is good replaced fuel pump 6wks ago and CAT's are both fine. Starts fine, after driving 5-10 minutes or incline when I accelerate it sputters and backfires which sounds like it is coming from passenger side under hood loose power. Then turn engine off restart and runs just fine for again another 5-10 minutes? I keep getting the P0171, P0174, P0131 codes have redone codes several times at idle and while driving? If anyone has any suggestions besides taking to a shop I am all ears here?
have the same problem?
Wednesday, April 30th, 2008 AT 2:04 PM