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Old 08-04-2008, 08:17 AM   #21
Drives: 2007 mini cooper S
Join Date: Jul 2008
Location: Atlanta
Posts: 70
I hope you all know why/how the computer knows to pull ignition and up the fuel/air ratio

KNOCK, that's right, the engine knock sensor, from preignition

it's NOT good, just because the engine is smart enough to retard ignition and richen the fuel does not mean it's good to run 87
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