My car is acting weird. When I push in the clutch when I come to a stop, my RPM's drop below the 600 rpm idle. It usually just goes down to 500 rpm but it sounds as if the car is about to die. It has never died on me but I am just worried because it is a new car for me. My girlfriends 2000 Mitsubishi Eclipse GT does this as well. Is this normal?

 

Thanks.