Hi Guys,

Got a bit of an odd problem, sometimes when accelerating the car pulses or surges. This seems to happen after long periods at open throttle , such as going up a national speed limit 14% hill near my house.

I have also noticed a distant whirring noise that accompanies this and when the acceleration pulses away, a noise like a wastegate noise, not a whooshing one, but a light chirrup noise.

I cant work this out, so any bright ideas would be much appreciated!!

Thanks Rocky