5.9 Cummins fuel problem (Still)
We own a 99 HR Endeavor with the 5.9 Cummins. Last year after returning from a 4 month winter trip we wanted some maintenance done. My mechanic called me and told me he had trouble starting the MH. H...
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Normally the fuel is pulled from the tank by the lift pump, then goes through the fuel filter on it's way to the injection pump.
Air in the filter would indicate a leak at or prior to the pump. (Fuel lines, fittings or gasket.) A leak after the pump would also leak fuel because those lines are pressurized.
Air in the filter after it is sealed is pushed out by bumping the lift pump several times. Your indication of engine running for a short time then quitting shows there is air in the filter. Air may have to be bled at the injectors to clear the lines after the injector pump.
Cummins later moved the 'lift' pump to the tank so that it pushes fuel rather than sucking, which is more efficient.
Air in the filter would indicate a leak at or prior to the pump. (Fuel lines, fittings or gasket.) A leak after the pump would also leak fuel because those lines are pressurized.
Air in the filter after it is sealed is pushed out by bumping the lift pump several times. Your indication of engine running for a short time then quitting shows there is air in the filter. Air may have to be bled at the injectors to clear the lines after the injector pump.
Cummins later moved the 'lift' pump to the tank so that it pushes fuel rather than sucking, which is more efficient.
