Possible Cause

Possible Remedy

Tank empty or tank vent blocked

Fill tank/bleed system, check tank vent

Fuel filter blocked

Replace fuel filter

Injection lines blocked/restricted

Drill to nominal I.D. or replace

Governor misadjusted or defective

Readjust or repair

Fuel injection pump defective or cannot be adjusted

Remove pump and service

Fuel-suppy lines blocked-restricted

Test all fuel supply lines - flush or replace

Loose connections, injection lines leak or broken

Tighten the connection, eliminate the leak

Pump-to-engine timing incorrect

Readjust timing

Injection nozzle defective

Repair or replace

Engine air filter blocked

Replace air filter element

Injection sequence does not correspond to firing order

Install fuel injection lines in the correct order

Maximum speed misadjusted

Readjust maximum speed screw

Overflow valve defective or blocked

Clean the orifice or replace fitting

Timing device defective

Repair or replace timing device

Low or uneven engine compression

Repair as necessary