Diesel Fuel Injection
Does your diesel suffer from leaking fuel, smoking, perhaps lack of power or poor starting?
Common Diesel Problems
White smoking at start up but clears on warm up
- Possible causes
- Incorrect pump timing
- Air in fuel
- Faulty glow plugs
Engine black smoking- Possible causes:
- Faulty injectors
- Injection pump malfunction
Diesel Fuel Injection
Common Diesel Problems
Does your diesel suffer from leaking fuel, smoking, perhaps lack of power or poor starting?

White smoking at start up but clears on warm up
- Possible causes:
- Injector nozzle valves stuck
- Incorrect pump timing
- Air in fuel
- Faulty flow plugs
Engine black smoking
- Possible causes:
- Faulty injectors
- Injection pump malfunction

Engine idles rough
- Possible causes:
- Fuel pump timing retarded
- Injection pump housing pressure too high
- Low opening pressure nozzles
- Injection line volume too low
- Dirty fuel filters

Engine starts but won’t idle
- Possible causes:
- Incorrect pump timing
- Faulty fuel supply
- Injector pump malfunction
- Air in fuel
- Restricted fuel return

Engine winds over but won’t start
- Possible causes:
- Faulty glow plugs
- No fuel to injection pump
- Solenoid problems
- Air in fuel
- Pump plungers stuck

Engine idles rough
- Possible causes:
- Fuel pump timing retarded
- Injection pump housing pressure too high
- Low opening pressure nozzles
- Injection line volume too low
- Dirty fuel filters

Engine starts but won’t idle- Possible causes:
- Incorrect pump timing
- Faulty fuel supply
- Injector pump malfunction
- Air in fuel
- Restricted fuel return
Engine winds over but won’t start
- Possible causes:
- Faulty glow plugs
- No fuel to injection pump
- Solenoid problems
- Air in fuel
- Pump plungers stuck