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backfire sound

Discussion in 'The Garage' started by scrappyk5, Nov 23, 2005.

  1. scrappyk5

    scrappyk5 1/2 ton status

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    when i shut my truck off , it kinda backfires through the exhaust. not really
    big , kinda just a "poof" what is doing it ?
     
  2. southernspeed

    southernspeed 1/2 ton status GMOTM Winner

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    Some systems will do this no matter what. Exhaust scavenging in all to do with sound waves and if your system causes a bit of conflict when your on a closed throttle deceleration you can get that burbling/popping noise.
    It is often also caused by an air leak in the exhaust or running a bit lean on the idle circuit.
     

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