Home / Toyota Supra Forums

Go Back   Toyota Supra Forums! Join the Supra forum! > Performance, Modification, and Maintenance Forums - for generation specific discussions > MKIII Supra

Reply
 
Thread Tools Display Modes
Old 08-26-2010, 01:43 AM   #1
sawcut64
Stock
 
Join Date: Aug 2010
Location: Arlington, Texas
Posts: 5
sawcut64 is on a distinguished road
Default Brake issue!

Hello I have a 1990 Supra Turbo with anti-lock brakes that aren't functioning correctly. The brakes when applied go all the way to the floor, become rock hard and barely work and you need to apply them again to stop. There are no leaks, and this happens the same whether the car is on or off. Also there is no brake light indicator.....just crappy brakes. Any help would be greatly appreciated!!
sawcut64 is offline   Reply With Quote
Old 08-26-2010, 03:22 AM   #2
Green7mgte
Supra Forum Moderator
 
Join Date: Nov 2009
Location: Green-Ohio
Posts: 1,297
Green7mgte is on a distinguished road
Default

you got brake fluid in the master cylinder?

either A: you have a pretty bad leak...
B: massive air in the brake lines...
C: a bad master cylinder

did you do any brake work in the last few days?

more often than not on older cars ( happened to me) you go to change the brakes and you will be advised to put a block of wood behind the brake peddle. to stop the peddle going all the way to the floor and over extending the "rubber" inside the master cylinder. the "rubber," "rips." and you need to rebuild or buy a new master cylinder.

(proof your master cylinder is faulty) you bleed and bleed and bleed but your brakes are still soggy.. You also see no leaking!

60 dollars auto zone and 3 minutes worth of work.

See the thread "maw and pa kettle change their brakes" do a search for it.

i re read your thread.
no leaks..
no brake light.. brake light is only a sensor showing you when your fluid is low. no leaks means no low fluid, no light...
__________________

92 Ma71 7mGTE Auto. SafcII
Supra FAQ
Supra MKIII FAQ
Classified Section guidelines :

Green7mgte is offline   Reply With Quote
Old 08-26-2010, 03:39 AM   #3
sawcut64
Stock
 
Join Date: Aug 2010
Location: Arlington, Texas
Posts: 5
sawcut64 is on a distinguished road
Default

Thank you Sir! The fluid is full so I'll swap the master cylinder, I mean really it can only be a few things? I checked at Autozone and the master cylinder is $75 and the booster is $239, both have to be special ordered. Honestly a 20 year old car it couldn't hurt to replace them even if they are still functioning. Again thanks!
sawcut64 is offline   Reply With Quote
Old 08-26-2010, 03:47 AM   #4
Green7mgte
Supra Forum Moderator
 
Join Date: Nov 2009
Location: Green-Ohio
Posts: 1,297
Green7mgte is on a distinguished road
Default

eh you probably dont need to replace the booster.. its just a drum with some seals in it.. acts as a vacuum.
http://www.cygnusx1.net/Supra/Librar...aspx?S=BR&P=15

but eh couldnt hurt any

oh do be carefull when bench bleeding the new MC. they give you RUBBER NUTS.. don't break on off in there like i did. causes problems if you cant get it out and it gets sucked down into the brake line..

like it did for me ;(

good luck and be sure to check that thread out.. has pics of the MC install

http://www.toyota-supra.info/forums/...ir-brakes.html

eh you can skip all of that and just read this
http://www.toyota-supra.info/forums/...-brakes-2.html

the only page that really matters.
__________________

92 Ma71 7mGTE Auto. SafcII
Supra FAQ
Supra MKIII FAQ
Classified Section guidelines :


Last edited by Green7mgte; 08-26-2010 at 03:56 AM.
Green7mgte is offline   Reply With Quote
Old 08-26-2010, 03:55 AM   #5
sawcut64
Stock
 
Join Date: Aug 2010
Location: Arlington, Texas
Posts: 5
sawcut64 is on a distinguished road
Default

Will do and thanks a bunch!!
sawcut64 is offline   Reply With Quote
Old 08-26-2010, 03:58 AM   #6
Green7mgte
Supra Forum Moderator
 
Join Date: Nov 2009
Location: Green-Ohio
Posts: 1,297
Green7mgte is on a distinguished road
Default

yep. post back and tell us how it went.
__________________

92 Ma71 7mGTE Auto. SafcII
Supra FAQ
Supra MKIII FAQ
Classified Section guidelines :

Green7mgte is offline   Reply With Quote
Old 08-26-2010, 04:11 AM   #7
sawcut64
Stock
 
Join Date: Aug 2010
Location: Arlington, Texas
Posts: 5
sawcut64 is on a distinguished road
Default

I sure will and if any blood starts to squirt out from the cuts I'll undoubtedly get, I'll post pics!!
sawcut64 is offline   Reply With Quote
Old 08-26-2010, 10:37 PM   #8
sawcut64
Stock
 
Join Date: Aug 2010
Location: Arlington, Texas
Posts: 5
sawcut64 is on a distinguished road
Default

Well it seems a few gentle taps with a hammer on the master cylinder and the brakes suddenly start working properly......no doubt time for a new master cylinder!
sawcut64 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
MKIII Wilwood 12.9" Rear Brakes With Parking Brake ARZ Arizona Performance 0 08-25-2010 07:34 PM
Engine Run-on Issue gottadiesel MKIII Supra 1 04-02-2009 08:26 AM
Maintenance brake and clutch master cylinder fluid IHateHacks MKIII Supra 1 04-18-2007 08:15 PM
Wilwood MKIII Rear brake kit ARZ Arizona Performance 0 03-16-2007 07:46 AM
help with a brake issue tonystarks Non-Generation Specific Questions 3 05-21-2006 11:53 PM


All times are GMT. The time now is 04:13 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.

1986



1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86