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Wits end on brakes 900 1994

posted by  Gary D on  Mon Aug 30 08:29 CST 2010
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last visit: Sun Jul 7 18:08 CST 2013
[RELATED]

This is a followup to an earlier posting on a low brake pedel on a '94 940T Sedan. This is my son's car, and we have been trying to resolve this problem for quite some time. The pedel travels quite a bit before it becomes firm. While applying braking power, the pedel feels mushier than it should before getting real firm. The brakes feel no where as firm as my old 740's and current V70 and XC70.

Here is what we have done over the last several months:

New (rebuilt) master cylinder
New (rebuilt) brake booster (to solve a cold weather problem)
New brake hoses on all 4 wheels
New (rebuilt) rear calipers (each had a frozen piston)
Front calipers checked and found be free with operational slide pins
Bled the brakes twice, there is no air coming out any of the calipers.

The system is not loosing any brake fluid, so there are no leaks.

None of the above actions have improved the problem.

What else is there that can cause a low pedel? Is it possible there is air hidden in the ABS modulator? It is the only place I can think of where air may still exist. Is there a way to check for air in the ABS, and get it out?

Any thoughts are greatly appreciated. This problem has got me stumped!

--
Gary D






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