Driving down the road then it started to to run rough and black smoke out the rear.

So pulled up opened bonnet to find Amal valve clicking and both wire had lost there insulation and think the was earthing on the k&n filter.

So unplugged it then the car went back to normal so seperated both wires and connect then it was all fine again.

So just need to clean up wires and a bit of heat shrink and it will be fine