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      12-15-2012, 03:04 PM   #17
VCP
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Drives: M4GTS BSM/F82 FB/E92Dakar
Join Date: Mar 2011
Location: Canada

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It's the knock system in how it reads pike cylinder pressure while applying 400vdc after combustion it's reads resistance to see if detonation is happening. So a old plug bigger gap maybe the fuel additive add to more initial resistance thus the ecu pulling power thinking detonation is forming. Just my two cent.