Notices
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Need Help Diagnosing Brake Problem

Thread Tools
 
Search this Thread
 
Old Jul 16, 2001 | 11:14 PM
  #1  
Fordtruxrok's Avatar
Fordtruxrok
Thread Starter
|
Senior User
Joined: Jul 2001
Posts: 250
Likes: 1
Need Help Diagnosing Brake Problem

 
Reply
Old Jul 24, 2001 | 09:30 PM
  #2  
cpgorman's Avatar
cpgorman
New User
25 Year Member
Joined: Jul 2000
Posts: 13
Likes: 0
Need Help Diagnosing Brake Problem

My 86 F150 has a strange problem with it's brakes. The first time you press the pedal, everything works fine, but if you hold the brakes on, like at a stop light, the pedal will slowly sink torwards the floor (it never actually reaches the floor, but will sink 2-3 inches). If you let off of the pedal and press it again, the brakes work OK again.

Any ideas?

 
Reply
Old Jul 24, 2001 | 09:50 PM
  #3  
quads's Avatar
quads
Senior User
25 Year Member
Joined: May 2000
Posts: 137
Likes: 0
From: conneaut usa
Need Help Diagnosing Brake Problem

is there any air in the line? also chrck and see if the power brake booster is leaking it sounds as if your losing pressure some where along the line...in the booster possibly or maybe in the Porportuning Vavle I would check those things first and go from there God bless

Marc Conley
Morganton Nc
82 F-100
W/302
 
Reply
Old Jul 24, 2001 | 10:00 PM
  #4  
mavman's Avatar
mavman
Senior User
20 Year Member
Joined: Oct 2000
Posts: 227
Likes: 0
From: arkansas
Need Help Diagnosing Brake Problem

master cylinder is leaking internally.
 
Reply
Old Jul 24, 2001 | 10:02 PM
  #5  
460v10's Avatar
460v10
Senior User
20 Year Member
Joined: Jul 2001
Posts: 111
Likes: 0
Need Help Diagnosing Brake Problem

Your master cylinder could be bypassing the fluid. There could also be fluid loss at the rear seals of the master cylinder also.
 
Reply




All times are GMT -5. The time now is 06:16 AM.

story-0
Top 10 Fords at 2026 Carlisle Ford Nationals

Slideshow: Top 10 Fords at 2026 Ford Nationals

By Joe Kucinski | 2026-06-09 11:10:08


VIEW MORE
story-1
3 Best / 3 Worst Parts of Modern Ford Ownership

Based on years of owning multiple modern Ford products.

By Brett Foote | 2026-06-09 10:53:36


VIEW MORE
story-2
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

SPONSORED: From muddy boots to rain-soaked cargo, these upgrades address some of the most common frustrations Ford truck owners face every day.

By Pouria Savadkouei | 2026-06-08 18:50:34


VIEW MORE
story-3
Every 2026 Ford Engine Explained

Here's everything you need to know about every Ford engine available for the 2026 model year.

By Brett Foote | 2026-06-05 12:58:01


VIEW MORE
story-4
10 Ugly Ford Trucks That We Still Kinda Love

Slideshow: 10 ugly Ford trucks that we still kinda love.

By Joe Kucinski | 2026-06-03 09:51:16


VIEW MORE
story-5
10 Things Every Truck Owner NEEDS (2026 Edition)

Slideshow: the best gifts for dads & grads

By Michael S. Palmer | 2026-06-03 15:43:58


VIEW MORE
story-6
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.

By Verdad Gallardo | 2026-06-03 11:38:36


VIEW MORE
story-7
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Slideshow: 10 most expensive Ford trucks ever sold on Bring a Trailer.

By Joe Kucinski | 2026-05-27 16:24:34


VIEW MORE
story-8
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Here's everything that has changed for the latest model year.

By Brett Foote | 2026-05-27 16:17:28


VIEW MORE
story-9
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE