Ask a Car Question, Get an Answer ASAP!
Hi I will continue waiting
Another possibility is that the fuel filter is blocked so resulting in low fuel pressure and again poor combustion - replace the filter in any case as diesels are very sensitive to this
also check how much oil is going through the breather by popping off the intake hose in front of the turbo and checking for oil deposits. Diesels will run off engine oil so this could also be making it rich
If its been overfilled with oil it will also produce surging as the oil finds its way back into the engine
The first thing that was tried was checking hoses filters etc and as stated in my question all sensors have been checked, plugged into a computer its is showing no faults, the ecu was also sent away for checking and came back with no faults.
Have tried all your suggestions with no luck
If this is OK then remove the high pressure intake hose after the turbo and have a feel of the turbine wheel - there should be no play radially at all - but a little bit of axial / end to end float is normal
one other possibility is that the wastegate actuator spring has gone soft so allowing the wastegate to open prematurely - if your actuator has a threaded end you can increase the preload on it to see if this improves things otherwise these units are quite cheap compared to a new turbo so it may be worth trying a replacement
Still no joy I'm afraid