I need your help with a voltage issue , I'm putting a Cummins 6.7 in a short bus. I have reached the point where I test drove the bus. upon reaching 25 mph the motor shut down. no response to foot pedal . when it had dropped to roughly 15mph it started responding and picking up speed . when it reached 25 it shut down again. This happened every time. This is the first Red Power Cummins motor swap I've ever done. I have been told it is a voltage issue with the fuel rail. I'm lost. electrical is not my strong point. if any of you have experienced this please tell me what you did and how to fix it.
fuel rail pressure sensor has a 5volt reference form pin 31 of the engine harness connector using INSITE it is the sensor supply 6 the return uses pin 21 of the same connector known as sensor return 6 this sensor doesn't care what speed you go maybe you have issue with pedal wiring itself now the pedal has two voltages to it both 5volts but one is sensor supply 4 and sensor supply 5 , now supply 5 also feeds 4 other sensors an issue with one of those other sensors could cause the TPS to fail (remote throttle,engine coolant level,fan speed and the delta p sensor on the dpf) all sensor supplies you can monitor with INSITE
OEM trained in wiring and all engine platforms for over 20 years
Are you doing a swap (taking out a Cummins 6.7 and installing another Cummins 6.7,) or an upgrade (swapping the Cummins 6.7 in for an inferior engine)?
Fuel rail voltage ?
Posted - 05/24/2019 : 10:00:17 AM
