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Q: The problems I'm having with my truck on 1995 Isuzu Pickup

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
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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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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