Hello,
I am new to this site and new to mustangs. I just bought this car this weekend and have a idle problem. When I take off and shift through the gears and them come to a complete stop the car will idle at around 2k and them come down to normal. It will do it everytime you take off and come to a stop. What do you guys think it could be. Thanks for any help or info you guys can give me.

 

Try cleaning the IAC vavle with Throttle Body cleaner, That will cause high idle issues.Then unplugged battery for 10 min after cleaning so engine relearns.

Youre suppose to replace it but many have cleaned it (including myself) and works perfect.

My guess is this is your problem..Good luck

 

Thank you just ordered a new one

 

Should fix it , Just remember to unplug battery .
Plus its good to get in that habit when work on cars anyways


GL and let us know if you fixed it

 

also the tps could be going out...but from what your saying seems more likely that its the iac

 

Thanks I replaced both but it still doing it staying at 2000 rpm and then coming down I'm getting ready to put it on the computer maybe it needs resetting what do you think

 

Where are you in florida if you don't mind my asking?

Also, to try and help with your problem, really check all your vacuum lines, and check for any sort of leaky gaskets/cold air intake or any leaks in the intake system.

 

check the mass air meter make sure that things clean...hopefully the computer adds some help