The engine runs erratically

Checks by the user

  • Fault in stop control
  • Restriction in a fuel pipe
  • Fault in fuel lift pump
  • Dirty fuel filter element
  • Restriction in filter/cleaner or air induction system
  • Air in fuel system
  • Fault in atomisers or atomisers of an incorrect type
  • Fault in cold start system
  • Restriction in fuel tank vent
  • Restricted movement of engine speed control
  • Engine temperature is too high
  • Valve tip clearances are incorrect
  • Too much oil or oil of wrong specification used in wet type oil cleaner

Check by the workshop personnel

  • Fault in fuel injection pump
  • Bad compression
  • Valves are not free
  • Wrong high-pressure pipes
  • Piston rings are not free or they are worn or broken
  • Piston is damaged
  • Valve spring is broken