Redex ,diesel system cleaner,250ml from amazon around £5.00quid,the bottle has a measure marked for "2 shots"it say's on the bottle contact website for tank sizes but I just chucked the lot in and filled it up to the cap as a "one of"I think it probably gave the injectors a good scrub! since its...

Sounds daft but try some fuel cleaner (Redex) if the pump is in the tank +gauge it may be sticky or possibly as easy as a sticky lip valve,what ever it is ,a £5 quid additive wont do any harm,and if it works ,your quids in.

I just bought a bottle of diesel system cleaner for my 128K TD5 had it 2 yrs now,so thinking that maybe the injectors need a clean and all the fuel bits I filled up the tank and threw the whole bottle in !,,, 250ml, (2 shots) , 1 week later the engine power smoothed out,no "chugging " at low...