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back fire and hole in muffler,

Discussion in 'Stock 1991 - 1994 Explorers' started by nothinbutroad, July 1, 2012.

^^Searches ExplorerForum.com^^



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  1. nothinbutroad

    nothinbutroad New Member

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    City, State:
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    Year, Model & Trim Level:
    1991 ford explorer
    my truck idles fine in park but backfires when i shift into drive, theres a large hole in the muffler, if i replace the muffler will the backfire stop? does a large hole in the muffler create a popping or backfire sound?
     
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  3. arco777

    arco777 Elite Explorer

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    Has anything changed since your earlier thread about the problem? http://explorerforum.com/forums/showthread.php?t=359909

    Replacing the muffler will not stop the cause of a backfire. Exhaust backpressure doesn't affect the running of the engine; unburned fuel in the exhaust is what causes a backfire.
     
  4. nothinbutroad

    nothinbutroad New Member

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    1991 ford explorer
    it runs great except for the popping, no more stalling, no more jerking at acceleration, its smooth, not running rich now, i got code 11 for koeo and 11 for koer, did the compression test, all in range, i didnt lose pressure on any cylinders.
     

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