Check Valve
Test vacuum check valve by disconnecting hose between check valve and servo. Apply 18 in. Hg vacuum to check valve. If vacuum does not hold, replace check valve. If check valve is okay, go to next step.
Test vacuum check valve by disconnecting hose between check valve and servo. Apply 18 in. Hg vacuum to check valve. If vacuum does not hold, replace check valve. If check valve is okay, go to next step.