Help :( R32 Hard Brake Pedal, Can't Find Out What It Causing It.

[Ten Four]

Heres the story:

Bought an unreg R32 GTS4 that had been sitting for a while. And now it wants to go over the pits and has failed twice for a hard brake pedal. So far this has been done:

Brakes bled

Front & Rear calipers reconditioned

New pads fitted

Master cylinder reconditioned

Rotors skimmed

Brake booster pressure tested

Brake fluid changed

The brakes react to first part of pedal travel but go solid when trying to press hard, ie in a emergency stop. This is why pits said they won't pass it.

NOTE: Car has factory ABS fitted.

So far, can't get rid of the hard pedal. Beginning to suspect while booster has passed pressure test, it is miss-performing. Has anybody got one that they can lend me to test? Or if it comes to it, anyone have a good condition one to sell?

Anybody had this problem before? (Rmb ABS fitted)

Edited February 7, 2009 by Ten Four

[nick81xd]

definetly will be a vacuum related issue with booster. check that the one way vavle in the booster hose isnt buggered.. just get another bit of hose in its place temporarly to check. if that doesnt work id say your booster is finished.