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Old 07-07-2015, 04:03 PM
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Brake peddle very low after bleeding

i am running hydro boost with a mustang 2 rack i have disc all around , now i plug off my master to check it and it is good ( both ports plugged and full pedal , no bleed off ) now when i pump the brakes i get half pedal ( motor off ) as soon as i start the motor no pedal , i have bleed the master ( 2 ports on side master ) several times , and bleed the wheels several times ,, what am i missing here??

please help

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Old 07-07-2015, 04:39 PM
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ohh i am running a GM pump its on a 5.3 didnt know if that mattered
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Old 07-07-2015, 04:51 PM
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Still have air in brakes. Try a slow gravity bleed.
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Old 07-09-2015, 03:48 AM
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we have bleed like crazy , we bought a new master,, see what happens , we are going to bench bleed it and go from there ,, the old master might have been sitting for a long time

thanks
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Old 07-09-2015, 04:49 AM
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I see this all the time. Disc brakes use a larger volume of fluid and running 4 wheel discs even more so. What many out there don't use are residual valves. They are used inline as close the the MC as possible. When you press on the brake pedal, the pedal is there but spongy. If you press it again it gets alittle harder. That's without residual valves!!
Residual valves are a one way valve. They prevent brake fluid from draining back in the lines. So the pedal stays where its supposed and not get soft or spongy.
I'm not telling you you have to use these to have brakes, just if you want a better pedal.
Residual valves come in 2 types..........10 lb...which is for disc/drum.........and 2 lb which is for disc/disc...............you will need two 2 lb inline.
I have 4 wheel Wilwood power disc on my car with these valves and have a very good pedal.
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