Medium and Heavy Trucks
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Hi my name is***** will be glad to try to help. If you have confirmed all your Battery and switched powers and ECM grounds are good, battery has full voltage supplying the ECM, and the Engine position sensor is getting signal to the ECM ( no sensor, harness, or signal issues) then I recommend coming up with a test ECm from another truck to confirm the current ECM is good. It sounds like the fuel system checks out okay as well. All points to an ECM issue. Let me know
id verify the EPS sensor is actually sending RPM signal to the ECM. It is possible it is not picking up signal from the gear to fire the injectors. Have you removed the sensor and cleaned and inspected the tip?
The fuel shutoff is powered and turning the fuel on correct?
Not at all.... That is failed ECM injector drivers id the ECM has all its powers and grounds and you are 100% sure the EPS is sensing RPM signal to the ECM.
The EPS ( cam sensor) can check good but still be bad. Check the connector for oil intrusion and remove the sensor to inspect for check for damage, bubbles and cracks in the face of the face of it. It should ohm out at 1500-2000 ohms . They will fail both hot and cold. Cummins Insite connected reading live data will show if EPS signal is missing.
Or just replace the sensor if the harness tests good.
If there is still a problem you are looking at an ECM issue.