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Found a ECM part number 240-5312-02, from everything I can find, this is for FMM C7 engines. When programming, I did get an error that it couldn't program the "Outside temperature sensor". Other than that, everything went through properly, FLS, FTS, configuration, trim files all appear good. ECM reports 370hp map as well.
Going on a drive, had less power than my normal 330hp. Then on a long pull, had the check engine light come on. Unfortunately no codes were active or stored...I checked all the other computers on the truck and no codes on them either. Swapped my original ECM back in and it works as it should again.
The outside temperature sensor is a strange one...there is no mention I can find anywhere in the wiring diagram. I did verify the pin is populated and it did give a resistance of something like 150ohm.
Any ideas?
Stock ECM:
240-5312-02 ECM:
Going on a drive, had less power than my normal 330hp. Then on a long pull, had the check engine light come on. Unfortunately no codes were active or stored...I checked all the other computers on the truck and no codes on them either. Swapped my original ECM back in and it works as it should again.
The outside temperature sensor is a strange one...there is no mention I can find anywhere in the wiring diagram. I did verify the pin is populated and it did give a resistance of something like 150ohm.
Any ideas?
Stock ECM:
240-5312-02 ECM: