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91 3.0 4Runner backfires...

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Old 11-20-2009, 08:25 AM
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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.
Old 11-20-2009, 08:26 AM
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is it a backfire: comes up the intake; or an afterfire: goes out the exhaust?
Old 11-20-2009, 08:38 AM
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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.
Old 11-22-2009, 11:11 AM
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