Power brake booster engages on its own.

Posted by calgt On 2015/3/20 17:38:42

Hi guys. I am new to this forum and have been reading and digesting all the posts and information I can in the past few months, Thanks for all the info.

I have been restoring a 1953 Packard Clipper 2 door coupe for the past few months. The car was in very nice condition and engine had been rebuilt not to long ago.

Now complete and driving, I have come across an issue with the power brakes. Prior to the restoration the brakes worked beautiful so the only items I replaced were the brake lines and vacuum lines. When I go to start the engine the brake pedal engages the brakes by itself without me applying my foot to the pedal. When I remove vacuum line to booster and plug line all works manually perfect. When car is turned off brakes feel normal.

Thanks in advanced for any help someone might have for this problem.