I've got two Holley's with electric chokes that are both doing the exact same thing on different vehicles. One is a brand new Street Avenger and the other is an older 4160. I even used to have an older 4150 that did the exact same thing. The fast idle will not kick down all the way after the engine is warm, it seems to be hanging up on the last step of the arm. When the motor is still cold, I am able to kick it down but as soon as it warms up I am unable to get all the way off. The arm itself seems to swing freely. I've tried adjusting the fast idle screw out but that hasn't resolved it, it has only lowered the idle. I've tried searching but haven't found what I need. I'm not sure where to turn next, any and all suggestions are appreciated.