Engine Cranks But Will Not Start (No Smoke From Exhaust) | Troubleshooting Cummins Diesel Engines

Cause	Correction
Incorrect Starting Procedure	Refer to “The Starting Procedure Matrix“.
OK
No Fuel in Tank	Add fuel.
OK
Electric or Manual Fuel Shutdown Not Open	Check for loose wires and verify that the solenoid is functioning. Check to be sure the manual shut-off lever is in the “Run” position.
OK
If the condition occurs during initial start, following an extended period of non-use or replacement of a fuel system component, air is in the fuel system	Bleed fuel system.
OK
If previous engine operation had been normal, injection pump not getting fuel	Loosen bleed plug at the filter head end. Operate the hand primer on the lift pump to check for fuel. Clean / replace lift pump, if necessary.
OK
Fuel Drain Back	Verify fuel return line is plumbed to the bottom of the fuel tank.
OK
Malfunctioning Fuel Return Overflow Valve	Check / replace fuel return overflow valve.
OK
Fuel Filter Plugged with Water or Other Contamination	Drain fuel-water seperator or replace fuel filter.
OK
Worn or Malfunctioning Injection Pump	Loosen the high pressure line at two injectors and visually check fuel delivery while cranking the engine. Replace injection pump, if fuel is not being delivered.
OK
Injection Pump Timing Incorrect	Check the injection pump timing.
OK

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