Hey what up...this doesnt happen all the time but sometimes when i put my coupe in neutral (5speed) and i am idle, the RPM's will surge up and down from about 500-1000. anyone experience this before or know what the cause might be? thanks.
On the front of your throttle body there is a small recessed screw. Try adjusting this screw when the problem is happening and see if it goes away. If you adjust it too much in the wrong direction the car will stall, just put it back some and restart the car. No damage will be done.