Mechanics

CAR HAS LACK OF POWER AND SPUTTERS WHEN EXCELERATING THE GAS

2002 GMC Envoy • 6 cylinder 2WD Automatic • 83,600 miles

Nter your question. My 2002 gmc envoy just started sputtering when excelerating and shakes when stoped and the check engine light comes on and off constantly what could this be
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Aaronsullenger
February 24, 2011.



The "check engine" light is an indicator for a system that monitors many electronic functions in the system, also called the "malfunction indicator lamp" (MIL). It can come on for any of hundreds of different causes from any of the systems that the computer monitors. Some are very important and can lead to further component or engine damage and some are emissions related not as serious but still a problem and need to be repaired.

Your first step is to have the computer scanned to retrieve the trouble codes that were set when the check engine light came on. Those codes will give you specific information about what the computer saw and will get you pointed in the right direction to find your problem. With a 1996 or newer and some 95 cars and you have an AutoZone or Advanced auto parts in your area, they will read them for free. Once you have these code numbers, we can be a lot more specific about what your problem may be.

Wrenchtech
Feb 24, 2011.