Engine Surges at Idle

Cause Correction
Low Fuel Level in Tank Fill fuel supply tank.

OK

 
Idle Speed Too Low Check / adjust low idle screw setting.

OK

 
Air in the Fuel System Bleed fuel system and check for suction leaks.

OK

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

OK

 
One or more Injectors Malfunctioning
Check / replace injectors.

OK

 
Worn or Malfunctioning Injection Pump
Remove pump. Have pump recalibrated or replace injection pump.