when attemtping to raise the idle speed the bolt head broke off the throttle body and now i cannot get the car to idle higher for the cam. it has some rust so unfortunately the rest of the screw might night be able to be moved in or out as ive tried remove throttle body before and its just about seized the the egr spacer. any ideas what i coudl do to try to free it up or anythign i can put on the end of the scew to take up more space and rasie the idle. thanks all