idling problem

my car seems to have an idling problem..
it goesup and down from about 1,000 rpms to 1500 to 1600 rpms..
any help on what the problem is ?
it goesup and down from about 1,000 rpms to 1500 to 1600 rpms..
any help on what the problem is ?
Comments
fitv?
Is the problem occurring when the engine is cold, warm or both?
is the Fast Idle Thermal Valve a expensive part to repalce?
or can i repair it or what?
thanks for all this information one of these things is bound to be the problem..