Possible Cause

Possible Remedy

Air in fuel system

Bleed fuel system, eliminate air leaks

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

Paraffin deposit in fuel filter

Replace filter, use winter fuel

Pump-to-engine timing incorrect

Readjust timing

Injection sequence does not correspond to firing order

Install fuel injection lines in the correct order

Timing device defective

Repair or replace timing device

Fuel injection pump defective or cannot be adjusted

Remove pump and service