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Old 12-09-2012, 05:18 PM   #2
Scooby Newbie
Member#: 322645
Join Date: Jun 2012
2012 WRX


Ok, Just some random thinking on my part but the two logs I took WOT both showed the the A/F climb in the 5800+ rpm region. The other one even showed a a couple data points past 6000 rpms with 18-19 A/F. The thing is the car shouldn't be pulling hard at those levels and it should be having a major detonation event if not outright blowing the engine. If you look at the data though my timing and Maf g/s are right where they always are at that point. Granted Maf g/s is a bit lower as I dropped my boost from 22 to 18 but outside of the A/F data the car is running fantastic under boost and cruise.

Is it possible for oil to destroy the stock 02? I did have the car overfilled back 10k or so when I was still pretending to have a warranty. Even got some smoke on start-up. Fixed it. Never smoked again. Did have some oil in the IC to TB pipe when I replaced the IC (not fresh oil, just oily sludge). No oil burn outside of the incident. Would a bad 02 display the issues described above? I mean the car drives just like it always has (outside of pushing too much fuel at start). I assume I could figure this out by hooking up a wideband?

EDIT: Cruise log and WOT log added.
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Last edited by dsm_luck; 12-09-2012 at 05:56 PM.
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