under the faq there is an issue thats refered to by ford as moosing, where your engine makes a wierd hum sound and its usually with the air on. The solution is the same as the throttle hang solution where you take a copper end cap (like those used in plumbing for water and gas) and drill a whole into the center and insert it into one of the houses attached to the manifolds (you can read about it more on the faq page)
