I had a 2000+ high idle on this motor w manual trans, so far the mechanic

yes I agree! This has been tortuous for me! It is a good thing this is my weekend car. I know on the control motor there is a set screw that was bad and he could not adjust it. OK that has been replace. Now they swear it will be OK once they replace the throttle body. they claim the car is from California and these things are different from that place due to CAL emissions. I told him this is it! If the thing is not better I am jerking the car outta there and taking it somewhere else. All over an idle issue! He claims he has checked for vacuum leaks I heard the smoke test is the best though. Uncertain if he did that....this is just a standard V6 NOT the CR 4!