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The problems I'm having with my truck

(1995 Isuzu Pickup)
in Colonial Beach, VA on April 24, 2009
The truck backfires when let up off the gas?
Motor run up and down when idle.
Foul smell coming from tail pipe?
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Popular Answer
Back firing in the exhaust on over run sounds like excess fuel being present in the exhaust. If there is unburned fuel in the exhaust then the catalytic converter works exceptionally hard causing it to smell badly and will eventually damage the catalytic converter. Have the Pickup checked out as soon as possible.
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