High idle speed out of no where.

[Jeb_Bush_2000]

Well, it seemed to happen every time it rained. It would also stall unless you gave it about 1/4 throttle, and every time you stopped, it'd stall. Warming up the car didn't help. However, it didn't always jump to a high idle; it seemed to only do that after you stalled and restarted it a few times.

I don't know if this has anything to do with your problem, but they're both Ford products from the same era....