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back fire and hole in muffler,


nothinbutroad

New Member
Joined
April 29, 2012
Messages
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0
City, State
Grand Terrace
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?
 




arco777

Elite Explorer
Joined
April 6, 2008
Messages
2,428
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Year, Model & Trim Level
1994 Explorer 2dr 4x4
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.
 




nothinbutroad

New Member
Joined
April 29, 2012
Messages
19
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0
City, State
Grand Terrace
Year, Model & Trim Level
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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