Speedometer problem - frostbite
I have a G-reg Scorpio with a tempremental speedo - quite a common fault on these, I believe.

It only works about one trip in three, and then the needle often moves as if it is in syrup. The mileometer appears to work normally at all times.

Has anyone ever revived one of these, or is a trip to the breakers* looming?

*for a speedo, not the car (yet)!
Speedometer problem - Dizzy {P}
I had a similar problem on my 1992 BMW about a year ago when wear in the bush allowed the spindle to pull over a few degrees and jam. Being an automatic, I couldn't use the tachometer to tell me how fast I was going and I was risking being caught speeding.

I revived the speedo two or three times but the fault kept reappearing so I bought a new one for about £100, not much more than the fine I would have received for speeding.