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Old 12-25-2010, 07:29 PM
tylerwilliams tylerwilliams is offline
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Join Date: Dec 2010
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Default 4.0 bank 1 bank 2

why are my codes saying system to lean in bank 1 and 2. I have checked my vaccum lines....also i have a true dual exhaust system with two racing bullets and my right tail pipe is a lot louder than left??? could use some help cause I am at a loss.
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Old 12-25-2010, 07:37 PM
terryduanemiller terryduanemiller is offline
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Default Re: 4.0 bank 1 bank 2

if one system is longer than the other, even a foot more of pipe will dramatically will change the sound
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Old 12-25-2010, 07:41 PM
tylerwilliams tylerwilliams is offline
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Default Re: 4.0 bank 1 bank 2

will that have anything to do with my codes coming up?
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Old 12-25-2010, 10:19 PM
terryduanemiller terryduanemiller is offline
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Default Re: 4.0 bank 1 bank 2

Im really not sure, not to familiar with 4.0's do a search on here, seen a few asking about banks running lean..
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