86 f150 Proportioning valve - Ford Muscle Forums : Ford Muscle Cars Tech Forum
 1Likes
  • 1 Post By RAGGAREN
 
LinkBack Thread Tools
post #1 of 6 (permalink) Old 12-26-2017, 09:32 AM Thread Starter
Registered User
 
Join Date: Apr 2013
Posts: 16
No brake pedal and fluid coming from proportioning valve
The rear brake line bypasses the proportioning valve for reason unknown the inlet on the p.valve isnt capped and somehow just started leaking.

This is my sons first car hes had for one day. While checking the brake lights the pedal lost pressure and we heard a pop. Found the rear pin to the valve on the ground. Pushed it back in and now fluid comes from the rear inlet,im not sure if theres a rear outlet at the back that holds the pin (should this b capped in my situation or does this pin just stay somehow) were gonna try to cap the inlet and outlet ,bleed and see what happens. Essentialy we have straight lines to the rear drums. Idk why its modified this way but it was working fine, i think when the pin came out the o ring moved and now its leaking because the front lines are still going thru the p.valve and fluid comes out of the unused inlet, maybe thr previous owner capped off the inlet and it failed,

Last edited by djimbeau; 12-26-2017 at 09:20 PM.
djimbeau is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 12-26-2017, 10:00 AM Thread Starter
Registered User
 
Join Date: Apr 2013
Posts: 16
Turns out the previous owner bypassed the proportioning valve with the rear lines but didnt cap off the old inlet or outlet, we simply capped them off and kept the front lines going thru the valve,bleed the lines.and stops fine the rear is just straight brake lines to drums.
I know my 65 has no proportioning valve
And it seems to work great at any speed

Last edited by djimbeau; 12-26-2017 at 08:25 PM. Reason: Fixed
djimbeau is offline  
post #3 of 6 (permalink) Old 12-26-2017, 11:12 AM
Registered User
 
Join Date: Jul 2017
Location: Yadkin valley, NC
Posts: 594
Garage
Re: 86 f150 Proportioning valve

Are you actually asking people if you can goober up your son's brakes?

1964 Thunderbird 390 V8, AOD, F.A.S.T. EZ EFI 1.0, Victor intake, MSD Ignition.
Yadkin is offline  
 
post #4 of 6 (permalink) Old 12-26-2017, 08:54 PM Thread Starter
Registered User
 
Join Date: Apr 2013
Posts: 16
Quote:
Originally Posted by Yadkin View Post
Are you actually asking people if you can goober up your son's brakes?
Bah humbug
I was actually asking for advice or info related to the subject...for an affordable fix my son spent everything he had to get this 86 f150 and i was giving him a chance to attempt to understand a fix on his own with the help of others who have an expertise in this area via forums wich is how i sometimes find solutions when theres not much online already about a particular subject thats new to me,but you sir taught another lesson
People say rude things in forums
Doesnt help anyone but the guy saying them, ill b sure and chime in next time you post with a rude comment?
And im not the first person to deal with a bypassed p. Valve. Lots of old school cars were manufactured without it and its pretty common on lifted 4◊4s esp with oversized wheels.
Thanks anyways
djimbeau is offline  
post #5 of 6 (permalink) Old 12-27-2017, 05:54 AM
Registered User
 
Join Date: Jul 2017
Location: Yadkin valley, NC
Posts: 594
Garage
Re: 86 f150 Proportioning valve

Because some guys take out the proportioning valves in vehicles doesn't make it OK. If changes are made that could affect braking balance, then buy an adjustable proportioning valve.

Why is a proportioning valve important? It applies the rear brakes first to help straighten the vehicle, then it provides the correct relative pressure to front and rear to prevent the rear from premature lockup.

1964 Thunderbird 390 V8, AOD, F.A.S.T. EZ EFI 1.0, Victor intake, MSD Ignition.
Yadkin is offline  
post #6 of 6 (permalink) Old 12-27-2017, 05:08 PM
Registered User
 
Join Date: Oct 2010
Location: San Francisco .Calif
Posts: 3,611
Re: 86 f150 Proportioning valve

i would not mess around with the old monkey'd around with prop valve...
they pretty inexpensive ,replace with a new one ..
safety first

https://www.ebay.com/itm/Proportioni...4383.l4275.c10
Yadkin likes this.

%201964%20Galaxie/?action=view&current=09-03-10_1408.jpg Lars...
64 galaxie 500 2dr fastback...390 4v, Bendtsen adapter, maddog's stage3 700R4 trans,3.70 Posi..far from perfect but getting there...
RAGGAREN is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Muscle Forums : Ford Muscle Cars Tech 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











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Proportioning Valve craigerGTA All Ford Techboard 1 02-14-2013 06:30 AM
Need Proportioning Valve for a 67... ZeroHour Galaxie Pages 6 05-24-2011 04:26 PM
proportioning valve 68montegomx All Ford Techboard 13 06-11-2010 04:30 PM
Proportioning valve HHStang All Ford Techboard 4 01-18-2004 06:34 PM
Do I Have a Proportioning Valve? Do I Need One? HankyJ All Ford Techboard 7 08-13-2002 07:44 AM

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