Question about 1999 GMC Jimmy
The truck runs fine until the engine warms up, then you turn it off and it turns over like its out gas but its firing
It is dieseling, there is an air leak in the intake circuitry allowing the motor to get enough fuel/air to run using the hot carbon or metal in the compression chamber to act like a spark plug.
If it's carbureted adjust the idle screw, if it's injected there is a faulty injector or sensor.
Posted on Sep 13, 2009
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Posted on Jan 02, 2017
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