Brakes are really soft all of a sudden. - Ford Powerstroke Diesel Forum
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 22 Old 03-02-2011, 06:40 AM Thread Starter
Powerstroke.org Fanatic
 
Join Date: May 2007
Posts: 132
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Brakes are really soft all of a sudden.

Yesterday my brake pedal went almost all the way to the floor. It stops fine at low speeds but the brake travels way to far and it stops like Im trying to stop 20k lbs. without trailer breaks. Also there is a clunk coming from somewhwere near the rear. The clunk only happens randomly so I really cant say it does it during certain types of braking just when I brake it will do it and sometimes it wont. Im looking at the master cylinder for the brake travel, any other ideas? Thanks

1997 F-250 Powerstroke diesel
5 speed manual transmission
4x4 Off road package
FPR shim
DIY Tymar intake
GFS SVO system (runs awsome)
T-ROD is offline  
post #2 of 22 Old 03-02-2011, 06:45 AM
Compression Ignition Addict
 
WSStucker's Avatar
 
Join Date: Nov 2008
Location: Schaumburg, IL
Posts: 175
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Same problem here, but without the clunk.

______________________________
2001 Excursion Limited 2X4
Zoodad, Marinco MOD, Rotella Synthetic
4" MBRP stainless turbo back, DIY Intake,
6 pos TW, Autometer trans-pyro-boost,
HP crossover tube.
** Newly added custom HYBRID tags **

2005 F550 Stock Company Truck w/ALTEC boom

WSStucker is offline  
post #3 of 22 Old 03-03-2011, 11:16 AM
Compression Ignition Addict
 
WSStucker's Avatar
 
Join Date: Nov 2008
Location: Schaumburg, IL
Posts: 175
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Bump..

______________________________
2001 Excursion Limited 2X4
Zoodad, Marinco MOD, Rotella Synthetic
4" MBRP stainless turbo back, DIY Intake,
6 pos TW, Autometer trans-pyro-boost,
HP crossover tube.
** Newly added custom HYBRID tags **

2005 F550 Stock Company Truck w/ALTEC boom

WSStucker is offline  
post #4 of 22 Old 03-03-2011, 11:19 AM
Compression Ignition Addict
 
Join Date: Dec 2007
Posts: 2,900
Thanks: 7
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Feedback Score: 2 reviews
subscribed, I had an excursion that did this. I never found out what it was. I replaced the master cylinder

2008 6.4 f250 lariat 4wd
melmount is offline  
post #5 of 22 Old 03-03-2011, 12:45 PM Thread Starter
Powerstroke.org Fanatic
 
Join Date: May 2007
Posts: 132
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Replaced the master cylinder as well. still having a similiar issue. A buddy thought it might be the abs valve/motor. Do obs trucks even have abs?

1997 F-250 Powerstroke diesel
5 speed manual transmission
4x4 Off road package
FPR shim
DIY Tymar intake
GFS SVO system (runs awsome)
T-ROD is offline  
post #6 of 22 Old 03-05-2011, 05:00 PM
Compression Ignition Addict
 
WSStucker's Avatar
 
Join Date: Nov 2008
Location: Schaumburg, IL
Posts: 175
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Bump again..

______________________________
2001 Excursion Limited 2X4
Zoodad, Marinco MOD, Rotella Synthetic
4" MBRP stainless turbo back, DIY Intake,
6 pos TW, Autometer trans-pyro-boost,
HP crossover tube.
** Newly added custom HYBRID tags **

2005 F550 Stock Company Truck w/ALTEC boom

WSStucker is offline  
post #7 of 22 Old 03-06-2011, 08:55 AM Thread Starter
Powerstroke.org Fanatic
 
Join Date: May 2007
Posts: 132
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Now i have replaced the booster as well. Still the same issue. Bled all the lines including the abs valve. No difference. I found out that our trucks do have RABS (rear anti-lock brake system) retarded idea from ford, but anyways. Going to pull the rear brakes off tommorrow and see if there is something wrong back there since the rear brakes control pedal height. If everything is good back there Ill be replacing the abs valve.

1997 F-250 Powerstroke diesel
5 speed manual transmission
4x4 Off road package
FPR shim
DIY Tymar intake
GFS SVO system (runs awsome)
T-ROD is offline  
post #8 of 22 Old 03-07-2011, 06:32 PM
Compression Ignition Addict
 
rolsmojave3's Avatar
 
Join Date: Feb 2008
Posts: 798
Thanks: 4
Thanked 6 Times in 6 Posts
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Feedback Score: 0 reviews
Sounds like you lost something in the rear, weather it be a shoe seperating or wheel cyl blow out. I'd defenetly check it out prior to driving it.

1997 Ford F-350 4x4 SRW regular cab manual trans.
-Rosewood 160cc, 17*HPOP, EPBV delete, 4.10s, 315/75r16

1996 Ford F-350 4x4 SRW CCLB manual trans. CALI spec
-ATS intercooler, WW2 w/ 1.0 housing/EPBV delete, Comp 910s, SD Efuel, 3.55s, 315/75r16

2002 Ranger FX4 with manual transfer case and Alcoa's
rolsmojave3 is offline  
post #9 of 22 Old 03-11-2011, 03:19 PM Thread Starter
Powerstroke.org Fanatic
 
Join Date: May 2007
Posts: 132
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Angry

Ok so I have replaced the master cylinder twice now because Napa has been having some issues with their master cylinders bypassing internally. I just replaced the ABS valve, bled all the lines, tightned up the rear brakes, replaced the parking brake cables because they were siezing up on me a little and I still have the same pedal creep. The brakes feel stronger but they will still slowly creep to the floor if I stand on them. Im at a loss now because I have replaced everything that could be causing the issue and I'm still having it. Im going to plug the holes on the master cylinder this weekend so I can isolate the master cylinder and see if my pedal still creeps if it does then I will have found my issue but if it doesn't I don't know what to do. Any suggestions?

1997 F-250 Powerstroke diesel
5 speed manual transmission
4x4 Off road package
FPR shim
DIY Tymar intake
GFS SVO system (runs awsome)
T-ROD is offline  
post #10 of 22 Old 03-12-2011, 05:10 AM
Compression Ignition Addict
 
rolsmojave3's Avatar
 
Join Date: Feb 2008
Posts: 798
Thanks: 4
Thanked 6 Times in 6 Posts
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Feedback Score: 0 reviews
Did you pull the drums to check it out?

1997 Ford F-350 4x4 SRW regular cab manual trans.
-Rosewood 160cc, 17*HPOP, EPBV delete, 4.10s, 315/75r16

1996 Ford F-350 4x4 SRW CCLB manual trans. CALI spec
-ATS intercooler, WW2 w/ 1.0 housing/EPBV delete, Comp 910s, SD Efuel, 3.55s, 315/75r16

2002 Ranger FX4 with manual transfer case and Alcoa's
rolsmojave3 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome