Why is my car is idling very high when in park?

Hello, this is not a forum where you can be taught how to check for vacuum leaks, unfortunately. You may be able to find some pointers on You Tube or some other web resource. If you have a vacuum or air leak somewhere, providing "fuel" in the area of that leak will straighten out the idle, even temporarily. A bottle of propane can be used for this; some folks use carburetor cleaner. Either way, if you aren't familiar with what to do and have substandard tools and equipment, this could create a big safety concern and a fire hazard, so -- i'd recommend seeking some local guidance. www.repairpal.com/repair-shops