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whuts causes backfire

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Old 06-04-2006, 02:45 PM
  #1  
Rustyj
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Default whuts causes backfire

like when ur downshifting it makes a back fire?
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Old 06-04-2006, 02:47 PM
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jonnyslick
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Default RE: whuts causes backfire

running too rich or and electrical problem. normally it's just running too rich ...
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Old 06-04-2006, 02:51 PM
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collincastaneda
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Default RE: whuts causes backfire

Cars also like to backfire when they don't have enough backpressure. Such as running 2 inch headers with 3 inch collectors and no cats and dumps or something. An engine needs that little bit of push.
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