The top left of the throttle body. BUT, if you are going to do the adjustment yourself, you need to get a Chiltons or similar technical manual, because you must disconnect something while making the adjustment. And DO NOT turn more than 1/4 of a turn per minute. There's really a whole process that you should follow when making idle checks and adjustments. I think you need to run the engine fast untill the cooling fan comes on to begin with. Believe me, you don't just want to go turning screws all over the place. You should follow the guidelines to check where your idle is now, and where it should be, and what exactly you need to do to get it there.