1990 ABS delete/service
Thread Starter
5th Gear
Joined: Nov 2021
Posts: 5
Likes: 0
1990 ABS delete/service
I recently bought my first car and corvette a 1990 black on black convertible. Since buying the car I've had sub par brakes and over the last 2 years I've replaced everything (with new oem parts) with the exception of the ABS system and the hard brake lines. My most recent issue is my front brake calipers not clamping at all. I had driven almost 3 months and the rear pads were completely consumed while the front pads were untouched. Having exhausted all my other options I feel as if my abs system is causing this issue.
Having little to no luck finding a new unit or rebuild kits/instruction I'm leaning towards removing the system all together. My intention is to keep the car for as long as possible and as close to factory spec as possible. I've read through alot of older post and wanted to see if there's some new information or resources.
That said does anyone have resources pertaining to this module?
From my research I haven't been able to find delete kits is that something that exists?
What kind of work is involved in replacing my 1990 lines with older lines that don't have ABS?
Do I need a Tech 2 tool to manually bleed my ABS? Can OBD2 work?
Thanks for taking the time
Zuhaib
Having little to no luck finding a new unit or rebuild kits/instruction I'm leaning towards removing the system all together. My intention is to keep the car for as long as possible and as close to factory spec as possible. I've read through alot of older post and wanted to see if there's some new information or resources.
That said does anyone have resources pertaining to this module?
From my research I haven't been able to find delete kits is that something that exists?
What kind of work is involved in replacing my 1990 lines with older lines that don't have ABS?
Do I need a Tech 2 tool to manually bleed my ABS? Can OBD2 work?
Thanks for taking the time
Zuhaib
Racer
Joined: Sep 2001
Posts: 363
Likes: 93
From: Chesterfield VA
Well it would be too much work to try and make a 85 system work on it. It would be easier to replace your abs pump system. The Tech2 will do no good as your 90 is before that was used. You would need to find a Tech1A and I still don't think you would need that to bleed the brakes on it. Out of curiosity though why do you think it is the ABS pump doing this. I would go back to the master cylinder, where did the replacement come from? I would try another, also you can buy a brake pressure gauge, you hook it up to a caliper at a time, see if you are getting pressure at each caliper when you press the brake pedal down. I would do that first before I attempt to do anything else. I know in the past I have had to replace several mastery cylinders before I get one that works.
Justin
Justin
Safety Car
Joined: Nov 2008
Posts: 3,713
Likes: 550
From: Seattle Washington
Sure sounds like the forward Master Cylinder is not Bleed. When You open a Caliper Bleeder in front and step on the Peddle are you getting Fluid ? Put a clear hose on it facing up and You can do this by your self.
Burning Brakes
Joined: Oct 2003
Posts: 1,090
Likes: 74
From: New Carlisle IN
For some reason you are not pushing fluid into the front calipers. As suggested above, crack a bleeder and press on the pedal to see if you get pressure there. If you do, then the pistons might be stuck? Master cylinder might not be pushing fluid. Lines might be blocked. Did you replace the rubber hoses? Those can deteriorate and look good on outside but be bad on inside.
Air in the ABS unit won't affect the brakes like that. It would only introduce air into the brake lines after the ABS was activated. That would give you a soft pedal. If your brakes were working, you can work air out of the unit by taking it to a lot/road with some gravel/sand on top of it. Hit the brakes hard and get ABS to activate, bleed brakes and repeat a few times.
A tech2 can be used to activate the ABS unit if you have the right adapters/modules to do so. I don't' know what those are, but my dad worked for Bosch and they had one he used to do that to his 90 ZR1. At one time he was looking into buying one for himself, but they were out of his price range.
Air in the ABS unit won't affect the brakes like that. It would only introduce air into the brake lines after the ABS was activated. That would give you a soft pedal. If your brakes were working, you can work air out of the unit by taking it to a lot/road with some gravel/sand on top of it. Hit the brakes hard and get ABS to activate, bleed brakes and repeat a few times.
A tech2 can be used to activate the ABS unit if you have the right adapters/modules to do so. I don't' know what those are, but my dad worked for Bosch and they had one he used to do that to his 90 ZR1. At one time he was looking into buying one for himself, but they were out of his price range.
