doggone1 wrote: 24 Oct 2022, 21:43
Yes runs on tickover fine and up to about two thousand rpm above that it gets rough white smoke and won’t go past 2750rpm advance solenoid makes no difference connected or not wonder if a diesel timing light would throw any light on it never knew there was one till today
White smoke suggests very poor combustion, the 'smoke' being mainly unburned fuel... Normal cause is poor compression but the fact the engine starts and runs fine at tick-over and up to 2000 rpm would tend to rule this out...
Low compression usually manifests itself as starting issues with copious amounts of white smoke.
The timing being wildly off at higher engine speeds could also very much cause it and this may now, with most everything else being comprehensively ruled out would suggest an ECU or pump problem - more likely the latter...
Diesel timing lights do exist and work by detecting the fuel pressure pulses in one injector pipe to determining the ignition point... They are very scarce and specialised...
An easier and better way is to have the engine on diagnostics... That'll check timing and also may give more clues...
liquidhandwash wrote: 25 Oct 2022, 00:01 The other problem could be low internal pump pressure, there is a lift pump inside the injector pump which can cause issues if the vanes get sticky, or if the pressure regulator has an issue.
Yes, absolutely it can as the pressurised fuel is used as a hydraulic fluid to set and control timing... Also could be caused by fuel starvation and/or copious amounts of air in the fuel supply to the pump...
A good way to check flow and for air bubbles is to temporarily substitute a length of clear hose between the end of the fuel filter and the pump...
A plugged fuel filter and/or a partially blocked tank strainer can cause fuel starvation... I take it the fuel filter has been replaced? If so then a check of the tank strainer would not be a bad idea - algae can grow on it and if sufficient grows it can significantly reduce flow...
