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Have a strange brake pedal problem. Good pedal when at standstill but with engine running pedal is to the floor and wont pump up. All fluid levels good and have bled the brakes with no bubbles. Vehicle is un-driveable. Can you help?
Hi, Check the brake booster check valve is OK or for a leak in the brake booster/brake booster vacuum hose etc. Here’s a link that may help explain it.
