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Old 03-10-2021, 10:50 AM   #9
Ashikabi
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Quote:
Originally Posted by FR-S2GT86 View Post
The O2 sensor output voltage will fluctuate. The ECU will see that and try to make fuel and timing compensations for those fluctuations. It will not run properly.
But the O2 sensor is already accounted for in the tuning. People run e85 with no flex fuel already. So long as your mix is consistent it would be ok. A fluctuating mix would be problematic. In this case, I assume he doesn't intend to use e85 any longer. So if zero volts from ECA means no ethanol, his tune won't be adjusted for ethanol and will therefore run properly. If it's 5v for no ethanol though, then that's bad

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