Theres a problem with m car idling .... when i first start the car, if i give the throttle a light blip... the revs go up, but on the way down it falls below 1000 almost to the point of stalling the car... now today for some reason i'm idling at 1500, which was a bit high?~?!

wots happening guys? i did a search but no 2 problems are exactly the same