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Hey lads, 04 rancher 350 manual shift - backfires when I decelerate, sounds like a decent gun shot. Anything I should be worried about?
 

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Look for a hole in your exhaust pipe or the pipe is maybe loose at the head end. This lets in a little air to allow allow any unburned fuel to burn or explode in your case.

Rick

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Don't know if you are putting Seafoam in your gas tank or not, but I've noticed that when I put Seafoam in my Rancher's gas tank, it backfires on deceleration, not all the time, but often. I only use Seafoam once in a great while now because of that.
 

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it also can be you need valve adjustmentb ----- because the timing chain is loose and throwing the adjustment off
 
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