High Idle

have you looked at the fuel pressure reglator or the timing when you changed the idel air control did you unhook battery for 10 min. so computer can relearn idel hope this helps

i'll ask and the battry keeps going dead from sitting so i would think that would of reset it

It might be you intake gaskets take WD-40 and spray it around the intake and if the engine slows down you have a leak.

theres also an idel screw on the throttle body make sure thats not set to high other wise you rpms will be to high

i have the same problem in my 91 cougar 5.0 it also makes a howling noise when i shut engine off what is the deal with this it runs ok

replace your IAC valve

its the throttle position sensor cuz that's what was with my cougar it was idling like that as well.

Ok thanks everyone I changed maf, throttle sencor,idle control, no vacuum leaks,changed all temperature sencors ,rebuilt the computer and took it to every Garage in town one said it was a intake leak wanted 400.00. To fix few wouldn't touch it others told me to junk it after 2 years I found a Garage that really looked at it and throwing no codes they really went over the parts and found out that the throttle position sensor was stuck open so after over two years she is running fine now thanks for everyone's help!!!

Have the same problem: idle revving way too high when you give it gas in neutral and not coming back down. Seems pretty strange to me, no way to adjust the idle so it doesn't do this. The battery went dead soon thereafter but the engine was still doing it with a new battery installed. Too many other issues now to be bothered with this damn car. When the dipstick tube broke off at the oil pan and you could no longer check the oil, I began to lose confidence in this vehicle. They wanted to remove the engine to change out the dipstick holder. I don't think so, guys. And then the odometer went out so you couldn't calculate oil usage by miles driven, knowing when it needs more oil or when to change it. And this is a "Special Edition" XR7. If you wonder why foreigners have beat our auto industry, this is the reason. They have no pride anymore. We've adopted that sick business model of the Japanese -- planned obsolescence, and are we ever paying for it, bigtime.