Was driving earlier this afternoon and for no reason a warning came on my display " engine system fault" then the power dropped, vehicle would only rev to around 2000rpm and do around 40mph.

No limp mode or max driving speed warnings.

This happened for 20 mins then it cleared and went back to normal, no warning display and full power but now I notice when I start the car up it turns over a lot more before firing up.

Any ideas? I've not tried driving it since but will tomorow and see how it go's Java black 2006

EGR valves probably sticking. Did you notice plumes of black smoke out of the exhausts

Never noticed any smoke Ady but to be fare I didn't check, ve had the valves both blanked a couple year ago could I still get bother from them? Java black 2006

I wouldn't of thought so, maybe check your intercooler hoses, they might have a split in them somewhere, another common fault.

Cheers Ady il check that Tomoro I had that problem with an old skyline once and it did have similar symptom Java black 2006

The fuel pump inside the fuel tank is to blame apparently. It's getting fixed now and should have it back thurs Java black 2006