300tdi injecter pump fault

help can any body help me been running on diesal /cooking oil mix 4 ages one of the drums i use wasnt very clean as ive found out it had a leaf in it got most of it out off lift pipe by sender unit then it ran fine now it only reves to 300 no more under load juts about does 15mph so ive bloww fuel pipe to lift pump out cleaned filter with petrol as new one fitted not long ago ticks over fine but once you apply reves pump sound like it not getting enough fuel tapping asif dry is there any way of checking pump for blokages or to clean out incase any leaf has got into it or do i need a new pump the tapping noise somtimes goes the when you give it som welley it back again

Leaf it out

ha ha you numpty

could still be a blocked fuel filter but also clean out the sedimentor.

I very much doubt it will be an injection pump fault, more likely your filter, sedimenter or lift pump mesh (if fitted) is blocked. Or it is coincidence that it happened when it happened and your lift pump has failed.

If you are in the habit of tipping UVO into the tank without adequately filtering it I would carry at least one spare fuel filter. They are a doddle to change and can be done in about 30 seconds.

To fit these: Unscrew old one, make sure o-rings come with it. Wet o-rings of new filter with some of the spilled diesel (DO NOT TIP DIESEL FROM OLD FILTER INTO NEW ONE - but if you have some handy you can fill the filter first, but make sure it is CLEAN, if it goes down the middle, it will go straight to the pump without any filtering) screw on new one. Turn on engine DON’T TOUCH ACCELERATOR, it will use the diesel in the pump to run it for long enough to fill the filter and push the air out via the pump. If you rev it, it uses more diesel and will probably stall needing turned over on the starter to prime it and your injection lines get air in them too.

At about £1.50 a filter you probably spent more on petrol than a new filter itself - it doesn't matter how long ago you changed it, you could run it for 3 miles and block it if you have unfiltered fuel going in - it may look clean but fatty deposits clog it up really well, like smothering the filter element in mastic would probably be less effective!

Also how much veg are you using % wise and how cold is it where you are now?