Well here I am again.

Sent the HPFP, rail, injectors to Diesel bob for a check. Turns out all 4 injectors were duff and the HPFP was shot. 4 new injectors and a repair to the HPP required.

Anyhow, fitted all the parts, removed and cleaned out tank, fuel lines etc and put everything back toegether. Car started well and drove. mile up the road......limp mode. Turn off, bugger to start again.

Only fault codes I'm getting are 00135 Fuel rail/system pressure too low and 04197 Fuel pressure regulation control difference.

Stuck as to what to do now. Think the repair to the HPFP didn't work out? Big sigh.