Start up was rough, idled for a short period of time and again shut off. No code. High negative fuel trims.
Immediately uploaded MHD OTS stage 2+ e30 map and it’s sitting here idling just fine. No codes and normal fuel trims
E31 octane being read out by my spool ethanol sensor via the spool performance App.
Car ran poorly, then stalled. Negative fuel trims were in the -20 range