Yup - bad gas won't cause an alarm. But the IAC (idle air control) will set an alarm (not all the time) and does exactly what happened. The IAC controls "idle". For future reference, you CAN start and operate the engine with a failed IAC. Advance the throttle to start the engine - then shift into netural and back into gear very quickly before the engine dies. Makes for touch docking/trailering, though.Thank you for the advice! We did put some fuel additive in as an extra step to be safe but it turned out to be the idle control valve. It was all burned up the mechanic said. No idea what that is, but it was running great again after he replaced that!
EDIT: Bad "gas", not "guess"
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