I was having problems with my iac, which was causing my rmps to be in the high 3000s when idle. talking to my friend who is a ford mechanic, i decided to change it. i changed it and it went back to normal.
after driving the car for maybe 30 mins or so, when i put it in park my rmp stays a little over 1. when if i turn the car off and then on, the rmp is below 1. is this normal? it could sound stupid but i never really paid attention... n now that i changed the IAC ive been paying attention like craaazy!
also, after turning the car on the rmp goes up to 2 and slowly makes its way down below 1.