Support told me to reinstall stock ECU, oil gauge was not working on HP ecu. Reinstall stock ecu, oil gauge worked as usual. Reinstalled HP ecu, after doing IMMO, truck will not start will just crank until hitting stop button. Reinstall stock ECU, confirmed stock ecu. Reinstalled HP tuners, same thing, crank only. Previously HP ecu worked, few hundred miles, for a few days as it should besides the oil gauge not working. Thanks for any input.