Quote:
Originally Posted by MotoWells
Figured if it did it was a fail-safe kicking in? I'm running the GMPP controller.
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ECM sees high temp, tries to run all fans etc -> IAT's will increase, truck will start to adjust fuel to compensate -> Neither makes a difference, temps keep rising ->Coolant temps go above safety margin, vehicle goes in low-octane tables and tries to retard timing to prevent detonation -> Temps keep rising, most likely Kr* count is increasing, and the ECM will try to limp the truck.
Scan the ECM with a code reader and see what it threw. Then clear it all off ( half of the codes can be false triggers from the air bubble and temp issues.
I'd consider changing the oil out anyway, even if it looks ok.