The Throttle Kicker solenoid is controlled by the EEC-IV computer and provides vacuum to the throttle kicker. This doesn't cause the kicker to kick the throttle, there is an electrical connection on the kicker itself for this purpose. With no electrical or vacuum input the throttle kicker collapses. With vacuum, but no electrical, the throttle kicker advances to the curb idle position. With vacuum and electrical input, the throttle kicker provides an extra 200-250 RPMs of throttle over curb idle.