Vacuum Leak? - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 02-08-2006, 10:19 AM   #21
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Reading through your last couple posts, I was about to comment on your mention of the brakes going to the floor.
BillBoost37 is offline   Reply With Quote
Old 02-08-2006, 12:43 PM   #22
Senior Member
True Car Nut
 
Join Date: Mar 2004
Location: Ames, Iowa
Posts: 3,066
Thanks: 0
Thanked 1 Time in 1 Post
bill buttermore is on a distinguished road
Default

Quote:
Originally Posted by 96LeSabre
I know what the problem is, the car finally decided to tell me, unfortunately it told me on the way to school today. My brakes decided they didn't like me. The brakes are real soft they work normal at first then give right in and you have to push to the floor to stop. They work a little better if you pump them. So needless to say I had to shift and pump the brakes in order to stop so I could get to school alive. Luckily I know the car well enough to know when to shift.
Is the fluid level falling quickly in the master cylinder reservoir?

If yes- you are leaking brake fluid somewhere. Look under the car after applying the brakes a few times.

If no, it is probably a bad master cylinder. A search here on master cylinder will yield much info.
bill buttermore is offline   Reply With Quote
Old 02-08-2006, 01:00 PM   #23
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Feb 2005
Location: Western New York State
Posts: 228
Thanks: 0
Thanked 0 Times in 0 Posts
96LeSabre is on a distinguished road
Default

OK, it leaked ALL of it'* fluid. I refilled it and now it won't leak. The brake light is gone but now it runs horrible and the CEL is on, I am getting that checked out in a few hours. Even after refilling the fluid the pedal still goes to the floor. I pumped the breaks but it won't stiffen back up...I don't see and leaks of any kind.
96LeSabre is offline   Reply With Quote
Old 02-08-2006, 01:28 PM   #24
Senior Member
True Car Nut
 
Join Date: Oct 2005
Location: Central Florida
Posts: 7,030
Thanks: 0
Thanked 0 Times in 0 Posts
lash is on a distinguished road
Default

If your brake master cylinder was completely empty, you have to bleed your brakes. You have air in the system.

Edit: It'* possible that your master cyclinder is going (a common occurance), but usually, that woould still allow you to pump them up. Not always. Also, look at your rear wheel cylinders and check for leaks there. Just a thought.
lash is offline   Reply With Quote
Old 02-08-2006, 01:53 PM   #25
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Feb 2005
Location: Western New York State
Posts: 228
Thanks: 0
Thanked 0 Times in 0 Posts
96LeSabre is on a distinguished road
Default

How do I bleed them? Is it hard?
96LeSabre is offline   Reply With Quote
Old 02-08-2006, 02:23 PM   #26
Senior Member
True Car Nut
 
Join Date: Oct 2005
Location: Central Florida
Posts: 7,030
Thanks: 0
Thanked 0 Times in 0 Posts
lash is on a distinguished road
Default

No, not hard at all, with a friend helping to pump the brakes while you open, bleed, then close each line. Just make sure that you keep fluid in the master cylinder at all times.

Here'* a thread that describes the procedure accurately (if somewhat roughly). About half way down.

bleed brakes
lash is offline   Reply With Quote
Old 02-08-2006, 02:26 PM   #27
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

If the master cylinder was out of fluid you have a large issue that needs to be corrected before bleeding.
BillBoost37 is offline   Reply With Quote
Old 02-08-2006, 02:28 PM   #28
Senior Member
True Car Nut
 
Join Date: Mar 2004
Location: Ames, Iowa
Posts: 3,066
Thanks: 0
Thanked 1 Time in 1 Post
bill buttermore is on a distinguished road
Default

If your reservoir was empty, you have a leak somewhere. You must find and fix that leak before you drive the car. After the leak is repaired, you can bleed the system. Because the reservoir drained, you will need to bleed the master cylinder as well as the service brakes. You will need to disconnect the brake lines on the master cylinder (MC) that run to the front and rear brakes, and install fittings with short hoses that loop back into the master cylinder reservoir under the surface of the fluid. Fill the reservoir and then slowly press down and release the brake pedal until no air bubbles are seen coming from the hoses under the fluid. The MC will then be bled. So you don't lose all the fluid from the reservoir, disconnect the bleed loops one at a time and reconnect the lines to the front and rear brakes. Take care not to let all the fluid drain from the MC reservoir or you will need to bleed it again.

Here is a description for brake bleeding:
http://www.bonnevilleclub.com/forum/...t=bleed+brakes
bill buttermore is offline   Reply With Quote
Old 02-08-2006, 02:33 PM   #29
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Feb 2005
Location: Western New York State
Posts: 228
Thanks: 0
Thanked 0 Times in 0 Posts
96LeSabre is on a distinguished road
Default

I found the leak after pumping the breaks more the fluid finally found it'* way through and starting coming out right near the right rear. So it'* a line leak...but the car still isn't idling right and the CEL is on...I will check it after school. The bad idling just started earlier when I put the new fluid in, it was fine coming to school this morning.
96LeSabre is offline   Reply With Quote
Old 02-08-2006, 02:35 PM   #30
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

You have more than one issue. The leak would not cause an idling problem. As yourself could something have gotten bumped or disconnected when you filled it.
BillBoost37 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Trouble codes and vacuum leak... mdevour 1987-1991 7 08-05-2006 12:19 PM
Possible vacuum leak laydbaak 1992-1999 7 04-18-2006 10:25 AM
Is this a vacuum leak cause I can't find it :( Overclock This 1992-1999 2 10-14-2005 06:09 PM
supercharger vacuum leak really isn't? billha Forced Induction 3 05-17-2005 12:34 PM
vacuum leak fix bobcaller General GM Chat 0 04-27-2004 12:04 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 04:54 AM.


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.