I severely doubt it as well,LR theory is combustion gasses bleeding into fuel gallery which to be fair has happened on other vehicles.The problem with this is the fuel pressure to the head is a constant 5.5 bar and the return is a constant 4 bar.I nicked an '04 sales car and ripped it to bits over a one week period!! So far i have spent,wait for it............190 (warranty) working hours on it!!!!!!!!SimonArmstrong said:I severly doubt that its the head causing that!
Does the vehicle generally run alrite? I.e at other times, does it run smoothly, is the idle smooth?
It could still be an electrical fault, but it is probably mechanical
As you well know, there isnt really any diagnosis you can do on a TD5 fuel system, well not the high pressure side anyway
Have you tried replacing the low pressure pump? or do these engines have a mechanical fuel life pump, it could also be at fault
Substitution is really the only method of finding out if it is a pump or injector problem. Working in an LR dealership, surely you should have access to plenty of parts/ other vehicles with which you could swap components?
Boy am i having fun!! Up to now i have subbed:- 3 ecu's;turbo;turbo modulator;associated pipes;turbo vac unit;ambient air sensor;air flow meter;manifold pressure sensor;injectors;driver demand switch;in tank fuel pump;filter and housing.Plus too many fuel,wiring checks etc to mention!! I now know all the help desk staff so well i'm thinking of inviting them for Christmas!!!! I was kinda hoping someone somewhere in the world would say "i had that" DOH!