Medium and Heavy Trucks
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Hi my name is***** will be glad to try to help. Does it shut down instanly like you shut off the key? If so I would have to say it is likely electrical like a loss of power or ground possibly to the ECM or IDM.... Check the relay and the harness and connections. Are there any fault codes?
Fuel pressure never drops off> Have you tried checking for air bubbles installing a clear hose on the suction and return side? I would verify that.... Also monitor the ICP pressure as well
You are loosing ICP pressure when it shuts down? Is this with a guage or through a scan tool?
Sounds like either a voltage problem to the IPR or a faulty IPR since the IPR controls the Pressure