Depending on the make and model of your car, vacuum runs various systems of which you are unaware. Most car owners do not understand that their car engine is a huge vacuum pump. When the crankshaft draws the piston down, it creates a powerful vacuum.
Vacuum hoses run from the intake manifold to other parts because that is where the most vacuum is generated by your engine while it is running. An intake manifold has several vacuum ports to which vacuum hoses are attached. The vacuum assists many functions of your vehicle. For instance, your vacuum works as a great brake assist and runs you cruise control. Other functions include running the Exhaust Gas Re-circulatory valve and your heating/AC vents.
Leaks in your vacuum hoses will cause your car to function poorly. Visit our service center at Jim Trenary Ford in Moscow Mills, MO to have your vacuum system checked for leaks.