At the side of the throttle body is the idle screw get the car upto temperature until fans kick in then disconnect idle valve then adjust the idle screw on the throttle body until the revs are at 950 then retighten the idle screw nut then plug idle valve back in revs will go up then back down this is your cokd start setup i know as i have the same management as you Mate and i had the same problem not now