Mustang V8-4.6L DOHC VIN R (2003)
Vacuum Brake Booster Check Valve: Description and Operation
Hose and Check Valve
The power brake booster check valve:
^
is located on the front of the power brake booster.
^
is installed separately; (install a new grommet when installing a new check valve).
^
is positioned between the power brake booster and the power brake booster hose.
^
closes when the engine is turned off.
^
in the closed position, traps engine vacuum in the power brake booster
^
retains vacuum to provide several power assisted brake applications with the engine off.
