Re: Sudden Loss of Power Brake Assist

Posted by Owen_Dyneto On 2012/5/8 10:45:14

Perhaps a sticking vacuum check valve. Follow the hose from the booster up to the intake manifold and you'll find the valve. Pretty simple little thing, often can be fixed by just cleaning, sometimes replacing the spring or ball.

EDIT: You said the power assist failed, not the brakes. Thus my guess on the vacuum check valve. If you can't repair it or find an NOS one if needed, they are still used on cars today so you could adapt a modern functional equivalent easily.