Quote:
Originally Posted by kambroso
The OFT Stage 2 hardware requirements call for a catted header, but you're saying it's still bad for that cat? I've also run the E85 tune during track seasons, which says catted or catless header, perhaps that tune isn't great for the cat either?
I'll post a new log as soon as I can.
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Intake leaks and exhaust leaks cause the sensors to read inncorrect data and make fuel adjustments incorrectly. You were likely running pig rich due to the leaks that killed the cats, plus E85, plus lower quality cats, plus a shelf tune....values were probably all over the place.
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2020 GMC Canyon Denali Duramax, 2021 Forester Sport, 2000 Subaru Legacy B4 RSK 5MT (JDM Import) and random 86 chassis rebuilds....