[Vassili95]

Like Chad was saying, it is notorious on the MTX.

For me it does have to do with the "idler" screw. The way it is designed, the metallic idler screw sits on a metallic hammer (stops at the idler screw). After time, the idler screw starts a tread in the hammer.

The stickiness comes from the driver pulling the accelerator cable, thus pulling on the hammer. When you release your gas pedal to zero throttle the hammer comes back and is stopped by the idler screw quite violently. Thus making a tread in it.

Mine was resolved by grinding down the idler screw and hammer enough that the surface was flat and smooth again.

Of course, like Chad said..another solution would be to remove the idler screw completely.

Peace...