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Old Jun 25, 2007, 10:14 PM   #1
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Join Date: Sep 2006
Location: RENO
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Drives: o6 evoIX GG

Walbro255

I just added a fuel pump and i know my car is going to run rich.Is it necessary to retune?Will it affect performance w/o a retune?
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Old Jul 11, 2007, 06:56 PM   #2
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Drives: 2003 Evo VIII

it should be fine without a retune but since you bought the pump I would tune it up
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