Does anyone know the name of the part that goes over the idle control valve (screw) to keep it from moving?
if youre talking about the idle control screw on the throttle body, there is nothing that covers it.
show pics … would be much more helpful for us to help u…
My idle adjustment screw had some type of waxy plastic stuff on it to prevent it from being adjusted I presume. Explore all other potential causes of a bad idle before changing the factory adjustment.