sometimes, my brake pedal resists

[firefighterwhite89]

Generally most of the time if I lightly push my brakes it seems like it has a lot of resistance. And when I first crank it it sounds like it has a bad vacuum leak. Anyone have any idea why it's doing this? Occasionally it's easy to push the pedal but most of the time it is fighting me.

[firefighterwhite89]

I noticed there's a vacuum leak sound. When I push the pedal it revs. To 2k rpm

[2oodoor]

check your check valve on the booster

[firefighterwhite89]

I still haven't made it around to checking my brake booster check valve. Whatever is leaking vacuum, it's a huge leak. Need to get unlazy and figure it out though.