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Cake day: March 28th, 2024

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  • Do you have and obd scanner? Maybe you could look at the o2 sensor live data to rule it out or not. The running rich seems in line with the open loop fuel management. Maybe it’s something electrical like thermostat or temp sensors. You can test the sensors with a multimeter I think. Here’s what somebody said about testing the thermostat:

    Feel the upper radiator hose after the engine has warmed up and determine if it is very hot or not. If it feels relatively cool, the thermostat is most likely the cause.

    You can also use the obd to see what temp the radiator fluid is getting to.

    Good luck!