superb !.9 diesel ....which on occasions has really impressive acceleration !!!    ( only occurs every once in a while  ) I am totally perplexed !!

Have you tried cleaning the variable vanes on the turbo?

 

Any fault codes?

As above any codes?

 

Does it always feel like it's on 4 cylinders - injector wiring loom known to fail intermittently.

 

The control systems for turbo variable vanes and EGR can also cause problems. And as mentioned above the turbo variable vanes can seize up/ stick . 

 

Tandem fuel pump (combined vacuum pump/fuel pump) can also give trouble. Any smell/leak of diesel?

 

Presume clutch not slipping?

Edited 18 January, 20224 yr by bigjohn

Hi Fellas....clutch not slipping ....does not seem to be down to 4 cylinders..........will look at the turbo vanes tho....perhaps that could be the answer....might be a racing car ALL the time....will report back anon...Thanks