NR350z

So over the past couple days, I feel as thought my brake pedal has had more travel in it than usual. Naturally I checked the fluid and the level is on max, and clean, not dark at all.

Also, visually inspected the brake master and around the booster, and doesn't seem to show signs of leaking.

Not sure if it matters but with the car off when pumping the brakes, the system builds pressure fine, and pedal becomes stiffer ...

Is it abnormal to get this feeling out of no where ? Brake pad thickness is fine and I haven't done a recent brake job ...

Feels as though the issue is intermittent as sometimes the pedal is more responsive than others ....

(03 Enthusiast, btw)

MicVelo

Sounds like classic "air in the system" and/or :"Hydraulic system starting to leak". Would power bleed then check all again. If that doesn't fix it, then check the vac booster for leakage.

NR350z

Thats precisely what I was thinking, but my thoughts are that i would think its impossible for air to get into the system without having a leak somewhere...

Vac booster, I visually inspected both the master cylinder, and brake booster, are you talking about something cool I've never heard about?

Ive got about 102k mi on the car at this point...

CK_32

iTrader: (1)

Bleed the brakes.

If it's not air maybe look into replacing the OEM lines. Could be expanding. But that would usually be mushy all the time not only sometimes.

NR350z

Yeah this my first thought, but is it possible for air to enter the system unless theres a leak?

CK_32

iTrader: (1)

Yea it's very possible.

Leaks aren't the only cause of air. Could be a number of things. But leaks are usually the top cause.

Either way it doesn't hurt to bleed and worst case you cross another possibility off the list. Could only make your brake feel better.. Well unless you add more air lol

chilled67

What are the condition of your rotors? I know how it sounds, but from personal experience if the thickness is nearing minimum discard it will increase brake pedal travel.

NR350z

Fronts were replaced about 8-9mos ago when I did new pads.