85 Silverado-Choke light is on all the time unless disconnected (!!). Idle is at around 1100 rpm and usually at 600-700rpm. If I flip the choke lever on the front left (looking aft) forward, the idle will go down to normal. Usually only have to tap the throttle for it to go down. Is my choke thermostat coil (?) shot or is something else going on?