I've got a Ranger Edge Ext Cab with a 3.0 and an idle like my .520 cammed hot-rod. Idled fine initially, but started to idle like crap after 1k miles or so. Took it into the dealer twice, and both times they said that there is nothing wrong with it, and the idle is normal. Called Ford, and they told me the same thing. Needless to say, the idle is not 'normal', nor is it acceptable in a $20k vehicle.

Any ideas?

Many thanks