Cadillac Repair: Idol High, volt ohm meter, digital volt ohm meter

Question
Hello, any ideas on why my car is idles high, only when I am on "Park" once I switch gears the sounds gets normal??

Answer
I need the YEAR and MODEL of the vehicle.

If you are mechanicaly inclined or know of someone who is, You will need a DIGITAL VOLT/OHM METER, Simple electrical schematics, Test procedures and picture locations of the components within the system that is causing you problems of which can't be done on this website which only allows one picture. I do not have a website so you will have to e-mail: onlineautohelp@msn.com in order to obtain the information necessary to fix your vehicle.