high reving after warm up

What is your question?

engine idles over 2 grand and wants to cruise the car at 35 to 40 mph after warmed up, won't idle down then sometimes does. 97 lincoln cont. 96,000 miles

What makes this problem better or worse?

worse when warm, cold is worse as it is in cold idle too

How long has your 1997 Lincoln Continental had this problem?

month