So now we decided that we would change the engine out of frustration as no faults showing up on VCDs. So i have took short video and joined together at different time intervals the engine warm up.
So replaced engine with the following Cam, crank, oil, HP Pump, Alternator, started well tick over sweet until warm same symptoms. So we then started with a Complete New EGR after we found the Diaphragm had a leak. Swapped out the EGR N75 solenoid ( but existing tested OK) EGR VACUUM SYSTEM SOLENOID (This also Tested OK) changed the Exhaust pressure sensor, Still the same problem. When warm It seems to make a loud diesel clank noise and then after a bit a dull clank noise almost sounds like a petrol and then back again, its really strange. Injector amount deviation seems to fluctuate on all injectors at tick over when rough at idle at temperature from -1xxxx to +2xxxx when rough idle I'm assuming its trying to correct itself. Rail pressure and sensor showing around 26 Bar at tick over,.
So far we haven't changed the..
front and rear Temp sensors
fuel temperature sensor
Turbo solenoid - cant see that being at fault.
MAF sensor
MAP sensor
Oxygen Lambda Sensor
Exhaust gas temperature sensors.
Throttle body
Any positive suggestions appreciated