so it was running fine and toiday when got into the van it started idling way to fast. di dun it on the highway hopeing that might kick it back but no results have any ideas what it might be the cause?
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Not an uncommon issue for one to idle fast while cold but , 2000 rpms is a little higher than normal. May want to check the engine coolant temperature sensor for proper voltage and the coolant level. Also, check for small vacuum leaks around the throttle body gasket.
Lets start at the beginning. Is the check engine light on ?
You have an idle air control valve which could be sticking open or shorted to ground. You should be able to unplug it to test. There also could be a gasket or hose that is opening up and causing a huge vac leak.
The ground should connect to the motor and the motor should connect to the body or chassis. Pour some water on the connection to the engine and the battery terminals. If it is a bad connection things should improve. If you jump start, the donor vehicle needs to be running at a fast idle.
Check the base plate gasket under the throttle body, some time the gasket start to leak, and will cause a high idle, if possible with engine running get some water and pore it at the base of the throttle bode, you will hear a suction sound, that's the gasket, replace it.