Spontaneous problem with vacuum
I've already checked and smoked all the lines and fixed the leaks I've found and still haven't fixed anything.
94 3.8 in a 90 Cougar. Suddenly it's started idling high, around 1400-1500, and the brake pedal goes about an inch or so easier than normal, but still applying brakes like normal. Along with this, my brake lights have decided to not work until the pedal is fully pressed. That, and sometimes when on the brakes, there is a groaning sound coming from the passenger side front corner where what appears to be the charcoal canister and what I'm told is a vacuum reservoir. It also makes the sound a few seconds or so after it's started.
I'm all out of ideas on what to check, and don't know anything about the canister and I've never even heard of a vacuum reservoir... any help please?