03-10-2010, 01:23 PM
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#1 (permalink)
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A True Z Fanatic
Join Date: Mar 2009
Location: Greenville NC
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Quote:
Originally Posted by j.arnaldo
Is it true that the ECU will advance (or the viceversa, if appropriate), when the octane rating varies, to compensate for the lack of power in the combustion process? Thanks, zmyride! Finally, would downgrading to 87 octanes hurt my 3.5L engine--not that I'm planning on doing it, but...
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Yes, it is triggered by the knock sensors. If you use a lower than optimal octane the detected knock will retard the engine timing (and consequent performance.)
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