chevy forums   chevy forums


Go Back   Chevy Forums > Chevy Forums - Cars > Chevy Cavalier Forum

Chevy Cavalier Forum Discussions regarding the Chevrolet Cavalier

Chevy Forum: 1992 Cavalier Delco VI ABS
Reply
 
Thread Tools
  #1  
Old 02-27-2020, 08:12 PM
caviar emptor caviar emptor is offline
Junior Member
 
Join Date: Feb 2020
Posts: 5
Default 1992 Cavalier Delco VI ABS

I have a 1992 Chev Cavalier RS, 2-door, 3.1L, V6, A/T, FWD, two sensor ABS and the driver side front caliper keeps locking up as if the caliper piston was seized and not releasing.

I have replaced the original caliper with a new caliper and bled the brakes. The brake bleeding was difficult, the brake fluid was barely trickling out even if the brake pedal was pushed in hard. Once the brakes were bled, the same problem (caliper not releasing pressure) reoccurred shortly after the car was started and brakes activated.

I get no ABS or BRAKE warning light.

I suspect this might be an ABS problem. I tried to look up some information. There is no visible identification as to what type of ABS system is on this car. The closest to identifying the ABS module was in this article:

http://www.j-body.org/forums/read.ph...37251&t=137206

The article tells me the Delco VI ABS has been installed in as an option on Saturn, Buick Skylar, Oldsmobile Cutlass Calais and Pontiac Grand Am models, it soon became standard equipment on most General Motors front-wheel drive passenger cars, including Buick Regal and Century, Chevy Impala, Monte Carlo, Malibu, Cavalier and Silhouette.

However, Delco VI is a four sensor ABS and my cavalier has only two sensors.

questions:
1/ can somebody confirm this is Delco VI ?
2/ how do i reset the ABS module and test it without using any special tools or scanners?
Reply With Quote

  #2  
Old 02-27-2020, 08:23 PM
zora zora is offline
Administrator
 
Join Date: Apr 2012
Posts: 3,571
Default Re: 1992 Cavalier Delco VI ABS

Before blaming the ABS system, have you tried replacing the brake caliper rubber hose? They collapse internally and create the problem you are describing.
Reply With Quote
  #3  
Old 02-28-2020, 01:41 PM
caviar emptor caviar emptor is offline
Junior Member
 
Join Date: Feb 2020
Posts: 5
Default Re: 1992 Cavalier Delco VI ABS

thank you for your suggestion to replace the rubber hose ... unfortunately replacing the rubber hose has not occurred to me even though... while working on the car... i noticed the rubber hose was/is in bad shape and the outer rubber lining broke and the inner insulation is exposed... i hope the rubber hose is not the issue since i already took the ABS module out and started taking it apart...

i may have provided incorrect info in my original post: it would appear the Delco VI ABS system is, indeed, 4 sensor system, not two as i thought previously, since i noticed electrical connectors and wires plugged into the hub behind the rear wheels.. as per attached diagram.

needless to say, since my original post was waiting for "approval" and i was not certain if this "approval" will take days.. weeks... or months, i found similar problem i am experiencing on the jaguar forum so i proceeded with the ABS module cleanup following this procedure:

https://www.jaguarforums.com/forum/x...-valve-188478/

if there is anything anybody can add to this information... i'd greatly appreciate it
Attached Thumbnails
Click image for larger version

Name:	abs.jpg
Views:	13
Size:	86.5 KB
ID:	469  

Last edited by caviar emptor; 02-28-2020 at 03:13 PM. Reason: adding diagram + explanation
Reply With Quote
  #4  
Old 02-28-2020, 03:30 PM
zora zora is offline
Administrator
 
Join Date: Apr 2012
Posts: 3,571
Default Re: 1992 Cavalier Delco VI ABS

Keep us posted on your results
Reply With Quote
  #5  
Old 03-03-2020, 12:50 AM
caviar emptor caviar emptor is offline
Junior Member
 
Join Date: Feb 2020
Posts: 5
Default Re: 1992 Cavalier Delco VI ABS

Quote:
Originally Posted by zora View Post
Before blaming the ABS system, have you tried replacing the brake caliper rubber hose? They collapse internally and create the problem you are describing.
for those who are not interested in reading my massive rant, the TL;DR bottom line is: the brake caliper flex rubber hose collapsed internally and created the described problem...

in any case, thank you for the suggestion to investigate/replace the caliper flex hose... unfortunately i did not get to act on your suggestion due to delays getting my questions up on this forum... and by the time my first post with questions was visible, i already ripped the ABS module out of the car and started taking it apart...

As i already mentioned above, i replaced the caliper since i had no reason to think it was anything else... at that time. Well, it was not the caliper... so i started searching on this forum and on the web what would be some other reasons why calipers would lock up wheels. Pretty much all sources suggested it was the ABS system so i focused on the ABS module and found sources which reinforced and confirmed my theory and played into my own bias. The post (below) on the jaguar forum totally convinced me it was faulty ABS - stuck ABS valve:

https://www.jaguarforums.com/forum/x...-valve-188478/

based on that ^, i found everything related to my Delco VI ABS system:

the principles of ABS and how it works:
http://faculty.ccbcmd.edu/~smacadof/...m10a_Final.pdf

how to service Delco ABS:
https://www.motor.com/magazinepdfs/062001_04.pdf

and how to bleed Delco VI ABS:
https://www.brakeandfrontend.com/bleeding-abs-systems/

https://www.autozone.com/repairguide...00c152802180b2

Turns out that after many hours of reading, researching, taking ABS out of the car, taking the ABS module apart, cleaning all ABS module components (and not finding any faults... the internals were clean as a whistle) ... and then putting the ABS back in, bleeding all brakes and the ABS module... the problem with brakes locking up persisted.

What was the problem.. you ask? Well, the fault was in 28yo flex brake hose which cost $15 and 20min to replace (Dorman H38905). It appears the hose collapsed internally and the obstruction inside the hose prevented the release of applied brake pressure; thus, the calipers remained clamped and the wheel locked.

so..., that's it... a problem that should've taken no more than 1hr to fix ended up being close to 30hr effort all together... sad and

i hope those ABS links ^ help somebody with their ABS trouble...
Reply With Quote
Reply

Tags
abs, brake, brake hose, delco, flex hose

Thread Tools

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 04:37 PM.


Sponsors




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
chevyforum.org recognizes that "Chevy", "Chevrolet", it's logos and various model names and numbers are registered trademarks of the General Motors Corporation. These terms are used for identification purposes only. chevyforum.org is not affiliated in any way with the General Motors Corporation, Chevy, Chevrolet or any other company listed herein. All information on this site is the opinion of its members and not the opinion of the site itself. 2017 Madison Ross Media Group. All rights reserved. Content published on ChevyForum.org requires permission for reprint.
MADISON ROSS MEDIA GROUP MARKETPLACE
Need products for your Chevy? Check out your options at the links below:

Miss the Chevrolet SS? Believe it or not, Kia may have something for you. The Kia Stinger is a large sport-oriented hatchback sedan in the mold of the Audi A7. The Kia Telluride is a mid-size SUV similar to the BMW X5...