[Eddles]

When I installed aftermarket cruise control on my car, the manual had information on how to solve the problem of getting speed data to the cruise control on cars with a mechanical speedometer, or no electronic speed pick-up[1]. It said that there was an optional package that can be brought and installed, and then wired up to the cruise control. I was lucky enough that my car had an electronic speedometer, so I don't know much about this.

Maybe it's worth looking for something like this if it's cheap? If you want, I can have a peek in the manual and find out more about this? Of course, I don't know if this will actually work with the MPGuino so it's just my 2 cents.

[1]Like one car I used to have that was built in 1990, had a strange electronic/mechanical hybrid piggy-backed on top of each other - the electronic pick up went to the computer, while the mechanical one went to the speedometer. Double check your car don't have this?