Engine Surges at Idle

CauseCorrection
Low Fuel Level in TankFill fuel supply tank.
OK

Idle Speed Too LowCheck / adjust low idle screw setting.
OK

Air in the Fuel SystemBleed fuel system and check for suction leaks.
OK

Fuel Supply RestrictedClean or replace pre-filters and screens, check for fuel line restrictions.
OK

One or more Injectors MalfunctioningCheck / replace injectors.
OK

Worn or Malfunctioning Injection PumpRemove pump. Have pump recalibrated or replace injection pump.