Brake booster loses vacuum

[Late Starter]

When the car sits for three days, it takes some effort to depress the brake pedal (A/T) enough to start the car. Vacuum sensor and check valve are fully seated in their grommets. Thinking of replacing the check valve myself to avoid having to leave the car at the dealer.

Has anyone else had a similar experience?

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[jasonstang]

Well if it's been sitting for 3 days of course the vacuum will be gone.