Engine Cranks, But Will Not Run

SYMPTOM DESCRIPTION:

Engine won't start, requires excessive cranking time, or starts then dies immediately.




POSSIBLE CAUSE ACTION

Empty fuel tank or ^ Fill tank.
fuel tank vent blocked ^ Bleed fuel system.

^ Check tank vent.



Improper fuel ^ Drain fuel tank, flush system,
and fill with proper fuel. Change
fuel filter.







Air in fuel system ^ Bleed fuel system.





Lack of voltage supplied ^ Check fuel solenoid circuit.
to the fuel solenoid



Fuel solenoid inoperative ^ Replace fuel solenoid.




Clogged fuel filter ^ Replace fuel filter.




Leaking, restricted, or damaged ^ Replace leaking or damaged
supply lines, or loose fuel lines or tighten connections as
connections needed. Bleed fuel system.





Wax buildup in fuel filter ^ Replace fuel filter, and
(cold weather only) verify that the proper fuel is
being used.




Incorrect injection pump to ^ Adjust injection pump timing.
engine timing



Air intake heating system ^ Check air intake heater relays.
malfunctioning

^ Check air intake system
electrical circuit.



Fuel injection sequence ^ Check fuel injection lines
does not correspond with for proper routing.
firing order




Low or uneven engine ^ Repair as necessary.
compression





Restricted, blocked, or ^ Remove restriction or
leaking fuel injector lines replace lines as necessary.
Bleed fuel system.






Malfunctioning
injection pump


^ If injection pump is malfunctioning
or will not adjust properly, replace as
a unit.