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Old 08-28-2011, 06:45 PM   #1
Scooby Newbie
Member#: 291461
Join Date: Aug 2011
Chapter/Region: VIC
Location: BC, Canada
2005 Sti
Stage 2 Cobb

Default Fine knock learn issue

Guys whenever my calculated load (g/rev) is below 1, my fine knock learn is -8.75, is that normal? other than that it stays at 0, but there is the odd time it'll stay at 0 with very little load.. Now i'm even more confused because i thought i understood the relationship between the two. But that aside, if it is an issue, how to i remedy it?
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Old 08-28-2011, 07:26 PM   #2
STi Mikey
Scooby Specialist
Member#: 114631
Join Date: May 2006
Chapter/Region: Tri-State
Location: TheShopCT / EFI LOGICS
2009 GTR, 735whp
13' Benz, 15' WRX


This can be caused by multiple things. You could have experienced some bad gas. If this happened, and the low load timing + cam advance were each high, this can happen.

If the car was hammered on and the re is scoring or scaring in the actual cylinders, this can be another reason.

Broken ringlands also can set the knock sensor off during low load cruise.

Reset the ECU. See if it comes back. If it does, do a compression and leak down test. If they check out, have a tuner check/recheck the car out.

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