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Pre 84 Trucks 1st gen pickups

my 81 yota is back fireing what could it be?

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Old Apr 20, 2010 | 07:09 PM
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west_89_
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my 81 yota is back fireing what could it be?
i have an 81 yota pick-up, 22r, 4.2L, long box. i just fixed one of the locking hubs and decided to take it out for a test drive and it back fired a couple of times any idea what it could be?
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Old Apr 20, 2010 | 11:22 PM
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was it on or off throttle?

think you meant 2.4L.
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Old Apr 21, 2010 | 06:21 AM
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lol yes i mean 2.4L and it was off the throttle.
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Old Apr 21, 2010 | 06:41 AM
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Check your AAP diaphram , It may have pin holes causing over fueling issues .. 1 sure sign is a blackened tail pipe


.
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Old Apr 21, 2010 | 06:44 AM
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thanks man
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