HDI revs to 2.3k revs only!

[CardHore]

Yeah its seriously down on power.... Also has a rattle up top, sounds like injector rattle but far worse, you hear it more on idle and throttle let off when its under no load. It did this especially following an oil change I did, I used that engine flush stuff too... Perhaps I shouldnt have?

I remember deffo AA guy flagging up

High Pressure Fuel Sensor
Glow Plug Circuit
Fuel Pressure regulator

Thanks so much for the amazing quick responses so far guys.