Hello,
I have a brake issue I was hoping someone may have some experience/insight with, I searched the forum and my service manual and haven’t had any luck.
When I apply the brakes on my 63 everything works normally and I initially have plenty of boosted brake. Once slowed the pedal will quickly drop away from my foot and the car begins to roll, so I panic jam the pedal and the car stops again.
I assumed since I was losing boost it was a vacuum issue so, based on some forum answers, I replaced the vacuum hoses from the manifold to the brake booster and one from the reservoir to booster. This did not help but I’ll keep checking for vacuum leaks. Maybe an internal booster leak? Would a bad check valve on the manifold line cause an issue like this?
Also, I did check for brake fluid leaks and could not find any, but this might be a master cylinder issue? I have zero experience with a bad master cylinder so I wouldn’t know.
Any ideas or advice is appreciated,
Thanks! Dave