I've narrowed down a throttle which won't return to idle unless I let it snap back to idle to a sticky throttle. Does anybody know what internally to the throttle that might be causing it to stick once the underhood temp reaches 200F? The vehicle is an 86 Mercury Sable 3.0. I've removed all the attached cables and it is indeed the throttle. I've subsequently removed the throttle valve which on this engine is the upper intake plenum and valve combined into one casting. Is there a common problem that you ford mechanics know of that I should look at? The needle bearings on either side of the butterfly look ok, and I see no reason for it to bind like it has been. One thing that ive noticed is that there is side to side play in the butterfly...is this normal?
Thanks