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Old 09-12-2008, 05:32 PM   #1
Geno H
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Join Date: Aug 2008
Location: Raymond Kansas
Posts: 28
Truck backfires only when shut off?????

When I shut my truck off after it is at operating temprature it backfires one time very loudly like a CANNON. Any ideas? Is it the timing maybe? I havent check it but I did have to replace the muffler after I bought it. Upon further inspection of the old muffler it was sure enough blown out not rusted out or worn out but it was blown apart. Any help would be appreciated.


Geno H
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1971 GMC 1/2 ton Project
1982 Chevy 3/4 ton Daily driver
1982 Chevy 1/2 ton SWB Big Project

Last edited by Geno H; 09-12-2008 at 05:34 PM.
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