help needed regarding rev counter

[Nibs83]

Hi folks, here is a super quick vid of my issue.
https://www.youtube.com/watch?v=YrPY...e_gdata_player

On ignition the revs jump to 500 even before its running.it's ticking over at just under 1000 On the timing light. Here's what I've changed/checked so far.
I tried.a different set of clocks, did the same.
I cleaned the pink wire to the coil, if I unclip this it won't start.
Changed the coil
Cleaned the following earths. All the ones in the engine bay and the 2 in both driver and passenger footwells.
It's driving me nuts, have I missed anything or any body know of different cures.

Cheers
Andy

[northy]

video is private mate

[Nibs83]

video is private mate

All sorted.changed to public

[northy]

thats more like a earthing / electrical issue to me mate.

[Nibs83]

Just what I wanted to hear. Anyone know where to start from?? Doing electrical tests?

[northy]

i would go through all the earth on the starter motor, bonnet, gearbox etc then see if there is any improvment.