Hey everyone, I have an 89 GT. When I have it idling with the clutch out (pedal not pushed in) it will always rev up to like 3000 and stay however when it idles with the clutch pushed in it idles fine. I know the mods don’t have anything to do with it because it was doing this last year before I re did the engine. I have checked for vacuum leaks and checked the throttle cable. The only thing that fixed it was adjusting the timing and keeping the spout unplugged but I noticed a drop in performance so I plugged the spout back in. Can someone please give me any suggestions?