Mstr cyl or ABS module
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Joined: Dec 2005
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Mstr cyl or ABS module
2005 F150 FX4
How can I determine which is causing my brake pedal to bleed off to the floor board?
Brakes also do not seem to stop as well since this started.
The MC is a much cheaper part compared to the 1200 bucks Ford dealer wants for the ABS module.
Can anyone assist with how to trouble shoot this?
Thanks to all.
How can I determine which is causing my brake pedal to bleed off to the floor board?
Brakes also do not seem to stop as well since this started.
The MC is a much cheaper part compared to the 1200 bucks Ford dealer wants for the ABS module.
Can anyone assist with how to trouble shoot this?
Thanks to all.
Last edited by BOYD MOORE; Mar 30, 2010 at 03:00 PM. Reason: left out truck year
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Joined: Dec 2004
Posts: 2,155
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From: Indiana
Yep... its likely an internal leak... the fluid is leaking around one of the seals but it leaks back into the reservoir so you don't see it.
You can't replace the seals so you have to replace the master cylinder.
Be sure to deplete the vacuum in the booster before you pull the MC off... with the engine off, pump the pedal till it gets hard as a rock. That way you don't suck the o-ring into the booster.
You can't replace the seals so you have to replace the master cylinder.
Be sure to deplete the vacuum in the booster before you pull the MC off... with the engine off, pump the pedal till it gets hard as a rock. That way you don't suck the o-ring into the booster.
