Issue with the rev counter

[pmanson]

Strange one last night - driving the car home from Tesco's last night and the revs appeared to be dropping but with no disernable change in the engine note...

Has anyone experienced this before? Possibly a bad earth on the instrument cluster?

[pmanson]

Was perfectly well behaved... still got the issue of it idling at 1500rpm when cold but that's a seperate issue