Disconnected the top a.f.m. [unplugged] forgot to reconnect, started the engine to warm it up, left it idling for 15 minutes, jumped in, drove off, 50 yards further down the road, revving the car told me something was amiss, realised the a.f.m was disconnected, so I reconnected, and since then the car idles high on about 1400 r.p.m when warm. Start up from cold, idling is perfect. Soon as it warms up idles at 1400 r.p.m. Idle adjuster screw is not even touching the bar. Please any suggestions?