brake issue on grand am - Great Lakes 4x4. The largest offroad forum in the Midwest

Go Back   Great Lakes 4x4. The largest offroad forum in the Midwest > 4x4 Talk > General Tech
GL4x4 Live! GL4x4 Casino

greatlakes4x4.com is the premier Great Lakes 4x4 Forum on the internet. Registered Users do not see the above ads.
Search
Reply
 
Thread Tools Search this Thread
Old September 6th, 2013, 06:25 PM   #1
BigBrutus
79Ford
 
BigBrutus's Avatar
 
Join Date: 08-27-10
Location: Portland,MI
Posts: 163
iTrader: (1)
Mentioned: 0 Post(s)
Default brake issue on grand am

I have a 2000 Pontiac grand am and I am trying to figure out a problem. Occasionally when I hit the brakes the brake pedal gets soft for a split secon and then it will be firm again. I have no leaks anywhere and I am clueless. Any help would ne awesome.
BigBrutus is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old September 6th, 2013, 06:56 PM   #2
Toivo
Feel lucky?
 
Toivo's Avatar
 
Join Date: 02-24-06
Location: Denver
Posts: 5,146
iTrader: (13)
Mentioned: 0 Post(s)
Default

Master cylinder or vacuum booster issue.
Toivo is offline   Reply With Quote
Old September 7th, 2013, 10:43 AM   #3
davidkassie
Senior Member
 
davidkassie's Avatar
 
Join Date: 01-29-09
Location: coloma michigan
Posts: 776
iTrader: (6)
Mentioned: 0 Post(s)
Default

not very common but have been bit by this, a very loose front wheel bearing can cause the rotor to push the caliper back in causing a long travel on the pedal.. and it may not make noise.. might wanna jack up the car and check, just a thought. but is probably master cylinder issue
davidkassie is offline   Reply With Quote
Old September 7th, 2013, 10:48 AM   #4
Toyfish
Senior Member
 
Toyfish's Avatar
 
Join Date: 02-05-10
Location: lapeer, MI
Posts: 2,137
iTrader: (31)
Mentioned: 7 Post(s)
Default

Quote:
Originally Posted by davidkassie View Post
not very common but have been bit by this, a very loose front wheel bearing can cause the rotor to push the caliper back in causing a long travel on the pedal.. and it may not make noise.. might wanna jack up the car and check, just a thought. but is probably master cylinder issue
X2

Sent from my DROID X2 using Tapatalk 2
Toyfish is online now   Reply With Quote
Old September 7th, 2013, 12:20 PM   #5
muddinman56
blood,sweat and beers
 
muddinman56's Avatar
 
Join Date: 10-06-08
Location: armada michigan
Posts: 3,691
iTrader: (18)
Mentioned: 0 Post(s)
Default

Break booster
muddinman56 is offline   Reply With Quote
Old September 12th, 2013, 05:35 PM   #6
BigBrutus
79Ford
 
BigBrutus's Avatar
 
Join Date: 08-27-10
Location: Portland,MI
Posts: 163
iTrader: (1)
Mentioned: 0 Post(s)
Default

Thanks for the help. Would a bad master cylinder cause abs light to turn on? I have to test all my abs sensors when I get a chance. Found a site that tells how to teat them.
BigBrutus is offline   Reply With Quote
Old September 12th, 2013, 05:52 PM   #7
in2deep
Hole tester
 
Join Date: 05-06-10
Location: muskegon,mi
Posts: 1,273
iTrader: (3)
Mentioned: 1 Post(s)
Default

is the abs unit on the master cyl? if so it could be that the leak internally
in2deep is offline   Reply With Quote
Old September 23rd, 2013, 10:15 PM   #8
Buggy_Tim
(513) 891-8372
 
Buggy_Tim's Avatar
 
Join Date: 11-05-05
Location: Sault Sainte Marie
Posts: 11,830
iTrader: (12)
Mentioned: 3 Post(s)
Default

Quote:
Originally Posted by BigBrutus View Post
Thanks for the help. Would a bad master cylinder cause abs light to turn on? I have to test all my abs sensors when I get a chance. Found a site that tells how to teat them.
Yes but a bad wheel bearing would be my bet for the ABS.

Just run up to the local AutoZone or something like that. They will pull the code for you for free.
Buggy_Tim is online now   Reply With Quote
Old September 23rd, 2013, 10:52 PM   #9
Nuggets
I fix stuff!
 
Nuggets's Avatar
 
Join Date: 09-15-06
Location: Bay City, MI
Posts: 13,433
iTrader: (13)
Mentioned: 3 Post(s)
Default

Quote:
Originally Posted by davidkassie View Post
not very common but have been bit by this, a very loose front wheel bearing can cause the rotor to push the caliper back in causing a long travel on the pedal.. and it may not make noise.. might wanna jack up the car and check, just a thought. but is probably master cylinder issue
Quote:
Originally Posted by BigBrutus View Post
Thanks for the help. Would a bad master cylinder cause abs light to turn on? I have to test all my abs sensors when I get a chance. Found a site that tells how to teat them.
Looks like the wheel bearing thing might have something to it.
Nuggets is offline   Reply With Quote
Reply
Great Lakes 4x4. The largest offroad forum in the Midwest > 4x4 Talk > General Tech

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

Forum Jump


All times are GMT -5. The time now is 09:52 PM.


Powered by: vBulletin, Copyright 2000 - 2012, Jelsoft Enterprises Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
Page generated in 0.15258 seconds with 48 queries