Bump
Eventually got hold of a new park switch, fitted, now wipers work better and park, but rev counter still erratic
aside from the rev counter itself being duff, anyone one got more suggestions before I order a new one?
Thanks
Hi,
My Mini did the very same thing a while ago, with the dancing rev counter every time the car started to misfire. The problem got gradually worse until the car wouldn't rev past 4000rpm then it eventually stopped on the side of the road.
My diagnosis was dodgy points or condenser but it was actually the coil breaking down!!!!!!
Once I had removed the coil from the clamp, all became very clear, basically the coil had been vibrating in it's clamp and had worn a hole through the coil body which then knackered the windings so this could be your problem!!

Hope this helps!
Steve.