A couple months ago, I took the car out for a drive and had significantly reduced stopping power (pads are relatively new). I flushed the brakes and that helped a little, but not much.
The booster appears to be ok and it is getting 18 in/hg of vacuum (the pedal is not hard and it passed the “hold pedal and start car” test).
My only thought is a stuck caliper. Earlier this summer, the car did get put away wet and the rotors rusted a bit and froze to the pads...
Any other thoughts would be greatly appreciated!