hi there
clean out you idle control valve and throttle body.
do not forget to synchronize it after you replace  the control valve you do this by turning  the ignition on for about 10 seconds 3 times (do not start the engine) until you repeat this procedure after which take the car for a 20 minute drive then all should be well. USE CARB CLEANER TO CLEAN THESE PARTS WITH.
                
 motortech
                
 April 2008