When heat and or cool air is on the AC unit starts to make a constant clicking sound, stops when I turn it off. I belive its the Ac unit but i guess it could be tensioner since there so close together.
I have spark at all four cylinders and all four carbs have fuel into them, all throttle linkage appears to be in order. I dont know what else to try, without pulling all four carbs......still stuck on four wheels...