S40 2.4i L5-2.4L VIN 38 B5244S4 (2008)
Remove:
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the clamp and the hose from the vacuum hose
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hose from the intake manifold.
Apply lock grip pliers to the hose for the charge air pipe.
Blow or suck in the hose end that was installed in the intake manifold.
The air flow must only go in the direction of the arrow. If not replace the valve.
Checking for leaks in vacuum hose power brake booster