My wife's '91, 940 Turbo with ABS seems to have (mechanic agrees) excessive brake pedal travel. Everything works fine but the brake pedal ends up within 4 cm of the floor boards with full brake. The top half of the travel seems to do nothing. This was a gradual onset thing. No lights came on, no pull on braking, stopping distance fine. New discs and pads about 12,000 km ago (200,000 Km on the clock). Needless worry?

I think you should make absolutely sure that the front caliper slides are not sticking. This might not be the problem but it is a known problem with these cars and I could see it causing this result as well as maybe uneven pad wear.
If the calipers are all ok, it's got to be in the master cylinder.
Good luck!
--
Rob Bareiss, New London CT ::: "Roterande Fläkt Och Drivremmar!"

Thanks for the help, the sliders were stuck and one of the hoses was swelling (all replaced, slider cleaned and reused).

I appreciate the time you've taken to help out, thanks. R

Even though I've found ABS ones to be a bit "softer", that does seem a bit on the low side.

Holding the brake pedal down, Does it continue sinking? If so, chances are greater that it's the master cylinder seals going south.

If not, then it's either that air got into the system, or that the brake lines are swelling up. A full system bleeding will rid of the air, and iPd stainless steel brake lines will cure the latter.

-- Kane
--
Blossom II - '91 745Ti/M46 ... Bubbles - '74 144GL/BW35 ... Buttercup - '86 245GL/AW70 ... The Wayback Machine - '64 P220/M40

Thanks for your help, the master cylinder was ok, two sliders stuck (!), cleaned and reused, one hose swelling under pressure, all replaced. Back to normal!

Thanks for the thoughts. I'll track this down and report back. R