brake booster shot/repair? replace? 97 lesabre - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Buick When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made.

Reply
 
 
 
Thread Tools Search this Thread
Old 03-26-2016, 10:17 PM   #1
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Mar 2016
Posts: 14
Thanks: 0
Thanked 1 Time in 1 Post
marcpilot1 is on a distinguished road
Default brake booster shot/repair? replace? 97 lesabre

Hi! Thanks for the help with the CPS! Car is running ex now, 180k on it.
But it has a brake booster issue that I'd love to fix before I drive it regularly again. The booster is shot or something. Only has like, hard to push, manual brakes and from start up to shut off all you hear the entire time is fshhhhhhhhhhh. The whole time you drive, any time you ever go anywhere! Its crazy.

That cover is a you know what to get off! I tried, it seems I have to pry a lot of tabs to get it off. Are the brake boosters all the same or is there differences throughout the years/cars. This is the 97 lesabre.
Thanks for any guidance. If there is a write up, that would be sweet but I didnt find one. Thx!!
marcpilot1 is offline   Reply With Quote
Old 03-27-2016, 04:29 AM   #2
Senior Member

True Car Nut
 
WilliamE's Avatar
 
Join Date: Jun 2011
Location: VA
Posts: 3,087
Thanked 418 Times in 376 Posts
WilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond repute
Default

Sounds like a bad brake booster, maybe the diaphragm is bad, you'd have to pull vac on it and see if it looses pressure, it should only let air flow one way...
WilliamE is offline   Reply With Quote
Old 03-27-2016, 05:38 PM   #3
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Mar 2016
Posts: 14
Thanks: 0
Thanked 1 Time in 1 Post
marcpilot1 is on a distinguished road
Default

Ok, I understand so far WilliamE. Thanks for that too! Real quick question, could it possibly be a simple problem? Like a check valve or something else little? If it couldnt be anything else sort of like that, I'll start on a replacement of this one. And lastly, can I get a used one from "you pull it"?
Thanks!
marcpilot1 is offline   Reply With Quote
Old 03-27-2016, 06:25 PM   #4
Senior Member

True Car Nut
 
WilliamE's Avatar
 
Join Date: Jun 2011
Location: VA
Posts: 3,087
Thanked 418 Times in 376 Posts
WilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond repute
Default

I found a video that should help you to find out if the booster and check valve is working ok, I'd try these 3 things out first.


You have inspected the brake booster hose right?
Make sure it is not dry-rotting.

If it turns out the booster itself is bad you can replace it with a re-manufactured one for like 65.00, 55.00 if you send old one back, and get the core fee refunded.
ACDELCO 14PB4095 {#19286795} Professional Durastop; Remanufactured

After you do those tests let me know how they go, by then maybe somebody that has experienced this exact issue, and fixed it will respond with some tips.
WilliamE is offline   Reply With Quote
Old 03-28-2016, 08:02 AM   #5
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Mar 2016
Posts: 14
Thanks: 0
Thanked 1 Time in 1 Post
marcpilot1 is on a distinguished road
Default

Ok WilliamE, I will def post updates as I go. All the way to when it'* fixed and working right again. (hopefully real soon!)
I'll start with the test links you sent, then go from there. You've been a huge help lately, thanks a lot!
marcpilot1 is offline   Reply With Quote
Old 03-28-2016, 05:38 PM   #6
Senior Member

True Car Nut
 
2kg4u's Avatar
 
Join Date: Sep 2006
Location: Windsor, Ontario / Detroit, Michigan
Posts: 4,804
Thanked 220 Times in 181 Posts
2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of
Default

Based on the noise you are hearing and the fact the brakes are hard to push I suspect the vacuum hose to the master cylinder is loose or damaged.
2kg4u is offline   Reply With Quote
The Following User Says Thank You to 2kg4u For This Useful Post:
WilliamE (03-28-2016)
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1994 LeSabre Brake Booster Check Valve indplsin72 Buick 2 06-28-2011 08:30 PM
Brake Booster? raptor660 Performance, Brainstorming & Tuning 2 02-28-2011 01:53 AM
62 bobbe power brake booster Skidooguy68 Classics (Star Chief and 1957 to 1986) 5 10-02-2009 09:54 PM
Master Cylinder/Brake Booster Question jams04 1992-1999 3 01-07-2007 01:38 PM
Brake booster issue? rmmartel 1992-1999 1 02-17-2004 02:31 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -4. The time now is 07:03 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.