Join Date: Oct 1999
Location: Forest Grove Oregon USA
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Re: Decelerating exhaust popping
If it's backfiring it would be timing or the like. If you have some mild "pop, pop," kinda more like air or compression noises that would be normal especially noticeable if you have an aftermarket muffler. Every truck or Jeep I've owned has done this after I've installed high flow exhaust. THe factory type mufflers usaully muffle this all out.