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post Jan 6, 2007 - 9:07 AM
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o0black0o

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I put some 3-2-1 headers on bout 2 weeks ago. We also removed cat and placed a gutted one. I would of assumed i would be getting better gas mileage. but Im accually down 100 miles per tank. We did reset the ECU, via pulling the battery cable for 10 minutes. Shouldn't I get better mileage by at least like 1mpg or something or is this common? I have the 7afe so It might differ from the 5s.

Also I dono if this might be a cause but, I installed an auto meter A/F raito gauge its not reading. I currently have no Check Engine Light. But Since my light isn't on my O2 Sesor should be fine. Its only abour 3 months old. Am i right?
 
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post Jan 7, 2007 - 12:27 AM
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Batman722



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getting less miles per tank is expected.

more flow = better performance
better performance = worse mileage


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