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91 3.0 4Runner backfires...

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Old Nov 20, 2009 | 08:25 AM
  #1  
jrobertson4runnner's Avatar
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From: Pflugerville, Texas
91 3.0 4Runner backfires...

Something my 4Runner has done, just wanting to get an opinion, thanks in advance for the help.
For the most part, the engine runs great, but once in a while, pretty randomly, it will backfire. I don't have any idea what causes it, and I want to try to fix it before my truck dies on me.
Any advice will be appreciated.
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Old Nov 20, 2009 | 08:26 AM
  #2  
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From: Temecula Valley, CA
is it a backfire: comes up the intake; or an afterfire: goes out the exhaust?
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Old Nov 20, 2009 | 08:38 AM
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From: Pflugerville, Texas
not really sure, i think it is a backfire. It pops, the RPMs go all the way to zero, and then instantly comes back, but the truck doesn't die.
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Old Nov 22, 2009 | 11:11 AM
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From: Pflugerville, Texas
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