2004 GMC Savana Repair Question
Topics covered: Air filter, Exhaust, Gas.
Mileage: 23,237 miles.
Mileage: 23,237 miles.
Asked on December 13, 2011
Vehicle has misfiring and O2 codes.
My 2004 GMC Savana V6 3500 VIN# 1GDJG1U141140461, misfire when it warms up. it stifles during acceleration. Small explosions can be heard in the exhaust system when the un-burnt gas ignites, while laboring to accelerate. What can be the problem? Vehicle has misfiring and O2 codes.
Asked by Lyndon GordonAnswer
Replied on December 13, 2011
repair the miss fires first and the o2 code may go away.
i would start with plugs, wires fuel and air filter.
Roy
Replied on December 14, 2011
Vehicle has new plugs and wires, runs good when cold. It starts to shake when it reaches normal operating temperature. To prevent misfiring I would turn it off at stop lights and restart it when light turns green. If I allow it to idle too long, it will start to misfire and shake.
Replied on December 14, 2011
other possibles are injectors, vacuum leaks and coil failure.
Roy