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  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

Brakes Again with the brakes.....

  • Thread starter Thread starter Northwest_stang
  • Start date Start date Dec 7, 2019
N

Northwest_stang

Member
Dec 30, 2018
89
9
18
Medford, OR
Dec 7, 2019
#1
  • Dec 7, 2019
  • #1
Ok so here we go again with the brakes.... so to recap brake pads, rotors, front flex lines are new. Master cylinder and power booster are salvage yard but inspected with a short warranty.

The problem is there is no pedal resistance or brakes when the car is on. When the car is off there is normal resistance. I am also able to press pedal down and while holding it start car and it will maintain pressure. However as soon as I left off and try to press back down there is no resistance again. The pedal will return to normal height after pressed every time wether car is on or off.

The MC and all lines have been bled multiple times so air is not in system. I have also pulled main ABS module plug by right fender well as well as all three fuses relating to the ABS

Something that was kind of weird was after bleeding all 4 wheels this morning the fluid level of my discard bottle didn't seem to change much. When I opened the bleeder fluid would push into the line but didn't seem to push more when I pressed brake pedal(doing 1 man bleed method) maybe I missed it but pretty sure I'm right
 

nickyb

I gotta say i never painted my nuts, Never Ever
15 Year Member
Apr 3, 2009
2,979
1,626
153
nevada
Dec 7, 2019
#2
  • Dec 7, 2019
  • #2
I don't know abouta.b.s. and stuff but if you did everything right with that then I suspect master cyl.
 
N

Northwest_stang

Member
Dec 30, 2018
89
9
18
Medford, OR
Dec 16, 2019
#3
  • Dec 16, 2019
  • #3
So brand new master installed and bench bled with no improvement I'm kinda at a loss. Maybe the hydraulic control unit? It just doesn't make as ny sense to me
 
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