2002 Chevy Silverado TRUCK SEEMS POSSESSED

ACEKEVIN

MEMBER
2002 CHEVROLET SILVERADO
6 CYL
2WD
AUTOMATIC
114,000 MILES

TRUCK RUNS FINE MOST OF THE TIME BUT ON OCCASION IT WILL SUDDENLY START BACKFIRING THROUGH THE THROTTLEBODY AND LOSING ALL POWER. IF TURNED OFF FOR 5 MINUTES OR SOMETIMES IF THE BATTERY IS DISCONNECTED FOR A FEW MINUTES IT WILL RESUME RUNNING FINE. I HAVE REPLACED BOTH CATALYTIC CONVERTERS, ALL TUNE UP PARTS ( cap, rotor, plugs, wires) help its driving me crazy ! ! ! !

5 Replies

WRENCHTECH

MECHANIC
20,757 POSTS

Is the check engine light coming on at all?

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Monday, September 13th, 2010 AT 6:59 AM

ACEKEVIN

MEMBER
3 POSTS

The ck engine light does come on when its acting up but goes out by itself when it starts running right again ! I TOLD YOU ITS POSSESSED ! !

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Monday, September 13th, 2010 AT 9:48 AM

WRENCHTECH

MECHANIC
20,757 POSTS

Apparently, you forgot that important detail in your question.

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.

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Monday, September 13th, 2010 AT 10:16 AM

ACEKEVIN

MEMBER
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Four of the codes indicated a possible malfunction of (1) of the four O2 sensors, the fifth code eluded to possibly the fuel pump ! It just doesnt make sense to me that any of these could be the problem given the sporadic nature of the problem. Can you enlighten me any?

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Monday, September 13th, 2010 AT 1:39 PM

WRENCHTECH