Quote:
Originally Posted by Kodename47
I can't fathom what's going on, both logs show differently. It should be that the STFT settle around 0 as the LTFT settle where they want. However looking at your bottom log, if you sum the LTFT and STFT they are around -10, which is what you had before, however the LTFT is massively negative and the STFT seem very positive. It doesn't give much of a clue as to why the LTFT is dropping so low when the STFT is trying to add fuel back in again, it seems strange that the trims are fighting each other. The Torque app does show that it is pulling fuel at a daft rate.
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Yes, I noticed that STFT and LTFT try to eliminate each other. My guess is the tune is supposed to keep the trims around 0, like on the stock car, which makes sense, so when one value moves away from 0, another is trying to compensate.
Here's another log, which I took right after I cleared the fault codes last time. The trim values were almost normal - around 0. LTFT tended to go negative, but stayed above -5%:
http://datazap.me/u/alpax/brz-jrsc20...g=2&data=1-2-3
LTFT stayed around -5 for a couple days, but when I checked two more days later, it was already below -10.
Quote:
Originally Posted by Kodename47
I would preliminary be looking for exhaust leaks or maybe the O2 sensor is faulty. Have you changed any of the exhaust? If not, could it be that the front cat has gone?
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No, the exhaust is stock. Well, everything is stock except that it's supercharged. I'm using the CARB tune, which was designed to work with the stock MAF, fuel and exhaust system.