4 Deg KR, 2 Knock Counts
Looking through the datalogs from our ZM TB testing i noticed some one or two knock counts on a few runs. It was 40'* weather, rainy, and I'm running straight 87 with 10% ethanol.
KR went up to 4 degrees after the 2nd count in one of my WOT runs. The 2nd Knock count occurred around 3500RPM, and killed timing until the end of the WOT run. I had a stored Code 042.
A few possibilities, perhaps my 147k cat, some hot spots in Cyl heads, etc.... Everything seems bolted down good in the engine bay, but i haven't checked in a while. Plugs are 1.5 years old IIRC, NGK TR-55 1 range colder.
EDIT:Fueling seemed on the rich side, O2 has about 40k on it, almost 4 years old.
'06 Vee Dub GTI 2 door Tornado Red
- 2.0 Turbocharged, Intercooled, Direct Injected, 6 Speed DSG, Underbody Aero, 17" Classix
- Moonroof, Bi-Xenon headlamps, Interlagos Plaid Sport Seats, 6 Disc In-dash, iPod integration, GTI Monster Mats (winter)
'93 Bonneville SE Purple Pearl H4U package - picked up June 23, 2003, Traded-in June 28, 2007...