General 1967-2002 F-Body Tech For general F-Body discussion that does not fit in any other forum.
For F-Body Technical/Information Discussion ONLY

What's causing my brakes to engage? Please help

Old 05-16-2019, 12:02 PM
  #1  
Registered User
Thread Starter
 
Dub Wair's Avatar
 
Join Date: Mar 2019
Location: Texas
Posts: 5
What's causing my brakes to engage? Please help


So I've completed my LS swap into my 94 z28. But now I keep having brake issues. After installing engine brakes lines had air in them. So i did pads, roders master cylinder. Took it to midas brakes and had them bleed properly. Brakes working perfectly. After awhile of engine break in driving I started noticing my car driving sluggish from time to time. Figured out the brakes were grabbing . Then I burnt my transmission. I've also replaced brake booster and EBCM ALSO because I don't know why they are grabbing. Any suggestions .

Last edited by Dub Wair; 05-16-2019 at 02:59 PM. Reason: Grammar
Dub Wair is offline  
Old 05-16-2019, 04:50 PM
  #2  
Super Moderator
 
Injuneer's Avatar
 
Join Date: Nov 1998
Location: Hell was full so they sent me to NJ
Posts: 67,143
Re: What's causing my brakes to engage? Please help

Not likely to get "tech" help in "Site Help and Suggestions"..... this forum is for problems with the site, like uploading photos, setting up your profile, entering a signature, etc. I'll move this to an appropriate tech forum where you are more likely to get help.

Fred / Moderator
Injuneer is offline  
Old 05-17-2019, 11:56 AM
  #3  
Super Moderator
 
Injuneer's Avatar
 
Join Date: Nov 1998
Location: Hell was full so they sent me to NJ
Posts: 67,143
Re: What's causing my brakes to engage? Please help

Is the brake system basically the stock 94 ABS system? Were any components relocated to accommodate the LS1 engine?

Does the brake pedal come back up fully when you take your foot off it?

Have you been able to determine is the failure of the brakes to release is all 4 wheels, or just front, or just back?

I wonder if Midas screwed up something in the ABS motor pack when they bled the brakes?

There's an interesting diagnostic chart in the factory service manual. I'll add a copy of it to this post when I get back to my PC.
Injuneer is offline  
Old 05-18-2019, 11:14 AM
  #4  
Registered User
Thread Starter
 
Dub Wair's Avatar
 
Join Date: Mar 2019
Location: Texas
Posts: 5
Re: What's causing my brakes to engage? Please help

1st ?. Yes stock abs
2. No components relocated
3. Yes brake pedals comes all the way up.
4. I can't 100% determined if all 4 are released but because of extremely high roader temps I'm sure it's all 4.
5. Not sure on motor pack. Where is it located and where is proportion value.? I also replaced brake booster. Thanks for responding

Last edited by Dub Wair; 05-18-2019 at 11:17 AM. Reason: Grammar
Dub Wair is offline  
Old 05-18-2019, 04:20 PM
  #5  
Super Moderator
 
Injuneer's Avatar
 
Join Date: Nov 1998
Location: Hell was full so they sent me to NJ
Posts: 67,143
Re: What's causing my brakes to engage? Please help

The ABS motor pack is the large silver mass mounted on the drivers side, under hood, inner fender. Has all the brake lines attached to it. The two lines from the master cylinder run to the combination valve on the side of the motor pack. That is primarily just a switch to detect pressure imbalance between the front and rear brake lines, to turn on the "BRAKE" light on the dash. "Proportioning" is done by the motor pack, based on differences between front and rear wheel speeds.

94 F-Body factory service manual brake diagnostics guide. If you need to download a copy of the manual, go here:

http://www.mediafire.com/?40mfgeoe4ctti
Attached Files
File Type: pdf
94 F-BODY BRAKES.pdf (1,019.6 KB, 2 views)
Injuneer is offline  
Old 05-18-2019, 04:28 PM
  #6  
Registered User
Thread Starter
 
Dub Wair's Avatar
 
Join Date: Mar 2019
Location: Texas
Posts: 5
Re: What's causing my brakes to engage? Please help

Originally Posted by Injuneer View Post
The ABS motor pack is the large silver mass mounted on the drivers side, under hood, inner fender. Has all the brake lines attached to it. The two lines from the master cylinder run to the combination valve on the side of the motor pack. That is primarily just a switch to detect pressure imbalance between the front and rear brake lines, to turn on the "BRAKE" light on the dash. "Proportioning" is done by the motor pack, based on differences between front and rear wheel speeds.

94 F-Body factory service manual brake diagnostics guide. If you need to download a copy of the manual, go here:

http://www.mediafire.com/?40mfgeoe4ctti

Swapped the motor pack already.
Dub Wair is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
ru2slo_99
Computer Diagnostics and Tuning
2
06-08-2007 01:18 PM
IEATGTS
LT1 Based Engine Tech
2
07-20-2004 10:00 AM
drewstealth
LT1 Based Engine Tech
23
05-31-2003 01:04 PM
Javier97Z28
LT1 Based Engine Tech
4
04-28-2003 11:55 AM


Thread Tools
Search this Thread
Quick Reply: What's causing my brakes to engage? Please help


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

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.