[libertylover]

Maybe it's just a matter of the meter you bought doesn't work. Try the meter you bought on another car for hire. If the meter works you must have some sort of compatibility problem-probably in the pulse/speed thing that you had installed. Maybe they installed the wrong one.

Ah, here it is! Probably the dealer installed the right speed sensor for your car instead of the right speed sensor for the meter that you bought. Have him install a speed sensor that goes with the meter you bought (after you verify the meter is good).