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Engine Misses Under Load

Engine Misses Under Load


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

Fuel-supply lines blocked-resticted

 

Test all fuel supply lines - flush or replace

Loose connections, injection lines leak or broken

 

Tighten the connection, elimate the leak

Paraffin deposit in fuel filter

 

Replace filter, use winter fuel

Pump-to-engine timing incorrect

 

Readjust timing

Injection nozzle defective

 

Repair or replace

Overflow valve defective or blocked

 

Clean the orifice or replace fitting

Fuel injection pump defective or cannot be adjusted

 

Remove pump and service

 

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