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Old 12-29-2012, 11:28 PM   #1
Scooby Newbie
Member#: 316365
Join Date: Apr 2012
Chapter/Region: TXIC
Location: Houston
2011 STI

Default Knock Sum Reading

I read a few threads here on knock readings and cant find a solution. My problem is cylinder 4 is picking up knock sum and also pulling between -1 to -4.9 timing. My tuner suggested it could be a cracked ringland or an external noise. We cant seem to locate the external noise. Could it be a cracked ringland causing the knock reading? Can it be tuned out?

Side note: Not smoking and good compression across the board. New spark plugs. Also datalogged with no knock event in 3rd gear WOT.

Vehicle Specs:
DW65c FP
Tomei Type-S FPR
Stock MAF/Intake
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Last edited by Smile83; 12-30-2012 at 10:17 AM.
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