Hissing brake pedal when cold...problem? - JeepForum.com

 
LinkBack Thread Tools
post #1 of 5 Old 03-23-2006, 02:03 PM Thread Starter
sethdallob
Registered User
 
Join Date: Jan 2006
Posts: 22
Hissing brake pedal when cold...problem?

I have a 99 WJ, and after I press the brake pedal and release, it hisses at me. After a while (couple minutes), it goes away. If I push the brake pedal down even slightly, the hiss goes away. It brakes just fine, whether hissing or not. Any ideas?

sethdallob is offline  
Sponsored Links
Advertisement
 
post #2 of 5 Old 03-23-2006, 05:49 PM
Varkyl
No where near stock
 
Varkyl's Avatar
 
Join Date: Jan 2006
Location: Glendale, Az
Posts: 1,924
Have you checked under the dash to see if you have a snake hiding under there?


Anyways, it sounds as though your vacuum booster may have a slight leak in it. Maybe another WJ owner can verify if this is normal or something to investigate.

Nathan
One slightly modified '96 ZJ

new sig coming soon
Varkyl is offline  
post #3 of 5 Old 03-23-2006, 08:59 PM
Robinton
Registered User
1999 XJ Cherokee 
 
Join Date: Oct 2005
Location: Atkins
Posts: 67
The booster draws in the air under the dash when you apply the brakes. There's supposed to be a foam silencer in the end of the booster to silence the hiss, over time the silencer deteriates and disappears. This is probably what's causing the hissing. It causes no problems except for some irritating noises.
Robinton is offline  
post #4 of 5 Old 03-24-2006, 12:04 AM Thread Starter
sethdallob
Registered User
 
Join Date: Jan 2006
Posts: 22
Thank you, that is a relief.
sethdallob is offline  
post #5 of 5 Old 03-24-2006, 11:50 AM
Vancopbs
Registered User
 
Join Date: Jan 2005
Location: South Gate, CA
Posts: 385
The foam filter quites the booster as you apply it. So when you press the pedal down the filter quites it. If it hisses after you relase the pedal, or hisses without you touching the pedal the booster is bad.

Van
Vanco Power Brake Supply
9738 Atlantic Ave
South Gate, Ca 90280
800-256-6295
323-563-1588
Vancopbs is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com 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 e-mail 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.




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 Jeep Forums Replies Last Post
Brake booster hissing twistedgalant ZJ Grand Cherokee Forum 4 02-03-2010 06:17 AM
Stiff Brake Pedal CLNinja ZJ Grand Cherokee Forum 3 02-02-2010 11:41 PM
brake pedal mushy macwig52 ZJ Grand Cherokee Forum 3 03-05-2009 03:53 PM
Hissing sound behind steering wheel - got cold last night dickensheets ZJ Grand Cherokee Forum 2 11-30-2008 06:57 PM
Problem with brake pedal? luke4x4 ZJ Grand Cherokee Forum 8 03-17-2006 06:51 PM

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 Off
Pingbacks are On
Refbacks are On

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