I have a 96 gt automatic and the idle is getting really annoying. At a stop the car shakes alot. I have to put it in park to make it stop shaking. It's even worse if the ac or heater is running. It's the worst when the car is cold though. Another thing I've noticed is that it takes a little while to start. I have to crank it for a while before it starts. The longest I counted one time was 7 seconds. Lastly, but most annoying is the whirring noise coming from the engine. It gets louder as the rpms go up. Someone told me it might be the belt. I changed the belt, replaced a bad pulley and checked the restof the pulleys. Noise is still present. Anyone have any suggestions to any of these. Might they be related? Thanx.