The car starts with iddle to hight - 2001 Chrysler 300M

Sounds like a possible vacuum leak. A vacuum leak will cause a high idle because the intake is pulling in more air than it thinks. Air is drawn in from the air box and THAT air passes through a mass air flow sensor. This sensor measures the amount of air coming in and the computer determins how much fuel to mix with that. If you have a vacuum leak, the mass air flow sensor does not get to measure that air thus you are getting more air through the intake than what the computer is delivering fuel for, resulting in a high idle. Does the idle stay higher than normal even after its warm? Can you hear a hissing sound under the hood? One way of locating a vacuum leak is by using carburettor cleaner. With the engine running, spray around the gasket area between the intake and the head. You are listening for a sudden change in RPM. If you hear this change in RPM, that location you sprayed is the source of your vacuum leak. If not at the gasket areas, spray all around all hoses going to the intake and all hose connections going to the intake (don't forget the hose that goes to the brake booster which is what the brake fluid resivour is attached to) Again, you are trying to create a change in RPM. Good luck!