Brakes locking up after 3 masters, calipers, lines, ABS Pump - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 06-12-2005, 10:57 PM   #11
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I've posted a chart for troubleshooting...this came from alldatapro.... http://www.logantele.com/~williams/BonneBrakes.zip
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Old 06-13-2005, 01:37 AM   #12
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not a damn thing still in shop hopefuly having delco gm master cylinder put on
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Old 06-13-2005, 02:15 AM   #13
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The front brakes are stronger than the rear. That explains why the front couldn't be turned and the rear barely could.

Here'* my idea;

Drive to a gravel or soft packed area, someplace where you can make the ABS engage. It'* very important that'* it'* near home.

If you get the ABS to engage two or three times and the brakes get worse, they didn't bleed them properly. With an ABS car you have to engage ABS to get the air out of it. I went through this myself.

Also since the Master is tipped back about 15* in the car, it MUST be bench bled before being installed.

After replacing the ABS pump and the Master there were alot of people bleeding your brakes, Any of them could have missed this info.

Now remember, If I'm right and you try this, You will have virtually NO BRAKES. I made it a mile home using my parking brake alone.
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Old 06-15-2005, 07:48 PM   #14
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Hey all,

Thanks for replying to my problem, in particular thanks lanman for posting the brakes troubleshooting files. We still don't have my sons car back from PEP boys. We called today and they are still looking at it. They had told us last Friday that they were going to put a new GM master cylinder on it. Today, they said they were looking at the brake booster, and were thinking they would replace that as well, at their expense.

So, we should know more in a few days. If they don't get it fixed, I think I'm going to send my son back to the dealer, and insist they diagnose and fix it, as they told us that for sure the new ABS pump they put on ($400 parts, $300, labor) was the problem.

If that does not result in anything, I am going to use the tips and trouble shooting info posted here to dig into it myself.

thanks, matt
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Old 06-17-2005, 12:10 AM   #15
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Good luck with it. And be sure to let us know what the problem was. We sure are curious!
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Old 06-17-2005, 02:47 AM   #16
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Like Bill said..please let us know. Many of us are very interested in what the actual problem is.
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Old 06-24-2005, 05:07 PM   #17
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Well, we got the car back from PEP boys. They put in a new master cylinder (not rebuilt) and a rebuilt booster. So it seems all the mechanical parts are now new, including calipers, back break pads, flex lines in front, and several new lines, and the ABS pump.

My son said the brakes already started to drag once, and the brake pedal got hard, and the ABS light again came on. He will try to drive it for a few more days and see what happens.

I'm curious, has anyone routed brake lines so as to bypass the ABS pump? I was thinking if this could be done, that would eliminate any question about the ABS system being involved.

Matt
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Old 06-24-2005, 09:33 PM   #18
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There is no way to bypass the ABS.

Try the tips I gave you.
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