Vacuum Asst. Brake Question
 

Hi. On my '69 2500 when the engine is running and I apply the brakes the peddle doesn't come all the way back up. I have to hook my foot behind the peddle and lift it up. When I shut off the engine, the peddle comes up as it should. Vacuum canister? This has me perplexed as I just replaced this part in '97. haha, jk. Or master cylinder? Thanks, -BA

Oh, when I shut then engine off I hear the vacuum hissing for a couple seconds and this never happened before. OK, probably the vac unit right?

Re: Vacuum Asst. Brake Question
 

Sounds like it could be vacuum booster related, but does your brake pedal still have the return spring attached to the top end of it up under the dash near the brake light switch?

https://classicparts.com/1967-77-bra...-return-spring

Re: Vacuum Asst. Brake Question
 

I think I checked this and actually added a couple springs but the peddle is pretty difficult to raise. It's not like it is hanging limp or something, it seems as though the brakes are even dragging a bit. Must be that vac unit me thinks. Thanks