My 1990 cadillac sedan deville Idles high. on 1990 Cadillac DeVille

If I press on the brake hard it will idle down. When I am driving if I let off the gass it will maintain speed, without the cruise control on. I just had a tune up done and it has been doing sinse then. What could thye problem be?

by in Syracuse, NY on November 10, 2012
1 answer
ANSWER by on November 11, 2012
possible vacuum leak