Go Back   Ford F150 Forum - Community of Ford Truck Fans > Pre-1997 F150 > 1987 - 1996 F150
Sign in using an external account
Register Forgot Password?


Welcome to F150 Forum!
Welcome to F150 Forum,

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 11-10-2007, 10:40 PM   #1
Junior Member
 
Join Date: Nov 2007
Location: Sacramento, CA.
Posts: 18
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default Bleeding ABS brakes

I have a 87 4.9 2WD. I have bled my brakes twice and they are still spongy. While setting at a stoplight with my foot on the brake pedal, the brake pedal will slowly depress to the floor. Is there a different way to bleed the brakes for ABS system than the conventional way of stepping on the brake and opening the bleeder valve?
wilecoyote is offline   Reply With Quote
Old 11-10-2007, 10:55 PM   #2
Senior Member
5 Year Member
 
wde3477's Avatar
 
Join Date: Jul 2007
Location: Cape Girardeau MO
Posts: 2,380
Mentioned: 0 Post(s)
Thanks: 0
Thanked 19 Times in 19 Posts
Feedback Score: 0 reviews
Default

Haven't had a problem bleeding mine. Start at right rear, then left rear, then right front, then left front. Bleed each one until the fluid no longer has air bubbles before going to the next. I find it takes close to two quarts of fluid to get mine where I'm satisfied.

Have you considered that the master cylinder may be faulty? Do you have the rear brakes adjusted properly (the star wheel thing)?

Did you make sure that the master cylinder never went low when bleeding? I know this may seem like a knock on your capabilities, but consider that this site deals with many posters with vastly different experience levels.

Do you close the bleeder valve before allowing the pedal to release? Or, are you using a self-bleeder kit, or having a friend do the pedal work?

You have the right idea - the brake pedal should be rock hard. Just a matter of figuring out why it's not.
__________________
1989 F150 XLT standard-cab shortbed 4x4, 5.0L, AOD, 3.55 gears, manual hubs, 31x10.50 tires, 216K miles. Repainted Oct09.
wde3477 is offline   Reply With Quote
Old 11-10-2007, 11:39 PM   #3
Junior Member
 
Join Date: Nov 2007
Location: Sacramento, CA.
Posts: 18
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

Thanks for your reply. My master cylinder, calipers and pads are two years old. The back brakes are 50 percent on the shoes and they are adjusted. There are no leaks that are visible. I started the bleeding at the right rear, left rear, front right, left front. I have done this twice, using up about two quarts of fluid. Not only did I get the air bubbles out, I also have clean clear fluid. I have my wife stepping on the brakes, she knows not to release the brake pedal until I tighten the bleeder valve and say "release the pedal". After each wheel I check the master cylinder to make sure fluid has not gone dry. The brake pedal is firm after bleeding but after starting the truck the pedal looses it's firmness. Does the Hydraulic Control Unit affect the way the brakes are bled?
wilecoyote is offline   Reply With Quote
Old 11-20-2007, 01:58 AM   #4
I Voted For Bill and Opus
5 Year Member
 
transmaster's Avatar
 
Join Date: Nov 2007
Location: Cheyenne, Wyoming
Posts: 2,039
Mentioned: 0 Post(s)
Thanks: 0
Thanked 5 Times in 5 Posts
Feedback Score: 0 reviews
Default Do yourself a favor.

Go get your self one of these.

http://www.motiveproducts.com/02bleeders.html

I have one and it is one of the best things I have ever purchased to work on braking systems. You should flush out, and replace your brake fluid every few years this pressure bleeder make that job a piece of cake, and you don't have to have somebody pumping the brake pedal you can do the whole job by your self. The one I have is the Power Bleeder Pro which is set up to service American cars. They have adapters to fit other master cylinders such as the old Volkswagen Beetle, BMW etc

Last edited by transmaster; 11-20-2007 at 02:06 AM.
transmaster is offline   Reply With Quote
Old 11-20-2007, 11:27 PM   #5
Junior Member
 
Join Date: Nov 2007
Location: Sacramento, CA.
Posts: 18
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

Thanks for the link. I'm all for making it easier.
__________________
1987 F150, XLT LARIAT, 4.9, 2WD, Automatic, 155,000 miles
wilecoyote is offline   Reply With Quote
Old 11-21-2007, 12:22 AM   #6
I Voted For Bill and Opus
5 Year Member
 
transmaster's Avatar
 
Join Date: Nov 2007
Location: Cheyenne, Wyoming
Posts: 2,039
Mentioned: 0 Post(s)
Thanks: 0
Thanked 5 Times in 5 Posts
Feedback Score: 0 reviews
Default

One thing you do not want to install are the bleeders that have the check-***** in them. They work great when you have clean brake fluid but
if there is any contamination and a piece of trash prevents the check ball from closing all of the way and you have a slow leak.

Incidentally it sounds like you have a bad master Cylinder.
transmaster is offline   Reply With Quote
Old 11-21-2007, 08:27 AM   #7
NGM
Resident A-hole
5 Year Member
 
NGM's Avatar
 
Join Date: Feb 2007
Location: Tallahassee
Posts: 4,098
Mentioned: 0 Post(s)
Thanks: 0
Thanked 20 Times in 17 Posts
Feedback Score: 0 reviews
Send a message via Yahoo to NGM
Default

IF you sit with the truck running and your foot on the brake does the pedal slowly sink to the floor?
__________________
SCT Tuner - 400.00
Jaws Racing Tunes - 150.00
Beating the wifes new GM truck - Priceless
http://www.jawsracing.net/
NGM is offline   Reply With Quote
Old 11-21-2007, 10:11 PM   #8
Junior Member
 
Join Date: Nov 2007
Location: Sacramento, CA.
Posts: 18
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

Yes. With the engine running and with my foot on the brake, it will slowly sink to the floor.
__________________
1987 F150, XLT LARIAT, 4.9, 2WD, Automatic, 155,000 miles
wilecoyote is offline   Reply With Quote
Old 11-21-2007, 10:44 PM   #9
Senior Member
5 Year Member
 
wde3477's Avatar
 
Join Date: Jul 2007
Location: Cape Girardeau MO
Posts: 2,380
Mentioned: 0 Post(s)
Thanks: 0
Thanked 19 Times in 19 Posts
Feedback Score: 0 reviews
Default

Sounding more like a bad master cylinder to me.
__________________
1989 F150 XLT standard-cab shortbed 4x4, 5.0L, AOD, 3.55 gears, manual hubs, 31x10.50 tires, 216K miles. Repainted Oct09.
wde3477 is offline   Reply With Quote
Old 11-22-2007, 12:03 AM   #10
Junior Member
 
Join Date: Nov 2007
Location: Sacramento, CA.
Posts: 18
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

Thanks wde3477 and transmaster. The master cylinder is only two years old, but with safety being paramount, the master cylinder is coming out. Thanks for your input.
__________________
1987 F150, XLT LARIAT, 4.9, 2WD, Automatic, 155,000 miles
wilecoyote is offline   Reply With Quote
Old 11-22-2007, 12:03 AM
 
 
 
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
bleeding clutch. tonkatruck66 1987 - 1996 F150 34 11-29-2012 06:28 PM
bleeding injectors? duckhunter Maintenance Shop 8 08-29-2008 12:45 PM
Bleeding 4 wheel ABS unit Good old Bill General F150 Discussion 0 07-28-2008 11:25 AM
No Brakes decibels5 Maintenance Shop 6 01-08-2008 02:03 AM
Brakes Squirtbottle09 2004 - 2008 Ford F150 0 11-04-2007 09:12 PM

 

The Mustang Source
All times are GMT -4. The time now is 05:50 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.5.2
Copyright 2006 - 20011 F150forum.com
This site is in no way affiliated with the Ford Motor Company.