C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Brake bleeding problem, no fluid at LF?

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Old Apr 13, 2014 | 06:54 PM
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Default Brake bleeding problem, no fluid at LF?

I was vacuum bleeding the brakes on my '87 today. All was going well, did RR, LR, RF, then I got the LF... Brake fluid will not come out of that hose no matter what I do. I even pulled the line off the caliper and pulled a vacuum on it (using a motorized vacuum pump) and nothing. Pumped the pedal, no fluid. ABS pump blocking it?

Ah, and the booster is bad too. Won't hold a vacuum. Having fun!
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Old Apr 13, 2014 | 07:06 PM
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colasped hose would be a fast quess
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Old Apr 13, 2014 | 07:13 PM
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Originally Posted by hooked073
colasped hose would be a fast quess

Remove the rubber hose from the steel line...and see if fluid comes out...if it does...you have a bad hose.

DUB
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Old Apr 13, 2014 | 08:37 PM
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A bad hose would really be a nice easy fix.

But if you do remove the flex hose and no fluid comes out, it's probably the ABS unit. There was a lot of clogged ABS units several years back as I remember.
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Old Apr 13, 2014 | 08:50 PM
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I hope it's as simple as a collapsed hose, but if it's like everything on this car it will be the worst possible cause :-)

It's a one owner car with 60K on it, but it's keeping me busy and constantly attacking my wallet.
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Old Dec 9, 2015 | 01:55 PM
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Originally Posted by jv9999
I hope it's as simple as a collapsed hose, but if it's like everything on this car it will be the worst possible cause :-)

It's a one owner car with 60K on it, but it's keeping me busy and constantly attacking my wallet.
Realize this is several months old, but just wondering how you made out. I have the same issue with the RF caliper releasing very slowly. Foolishly, I threw parts at it before realizing it was the ABS pump. Have another issue with the abs after trying to remove a relay; it fried a wire in the harness. Was able to get a salvage one, but haven't installed it yet. Just wondering how your problem went....
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Old Dec 10, 2015 | 09:51 PM
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Originally Posted by vetteboy88
Realize this is several months old, but just wondering how you made out. I have the same issue with the RF caliper releasing very slowly. Foolishly, I threw parts at it before realizing it was the ABS pump. Have another issue with the abs after trying to remove a relay; it fried a wire in the harness. Was able to get a salvage one, but haven't installed it yet. Just wondering how your problem went....
I managed to free the solenoid that was stuck, but honestly you're better off just finding a good pump.
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Old Dec 11, 2015 | 04:30 PM
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Originally Posted by jv9999
I managed to free the solenoid that was stuck, but honestly you're better off just finding a good pump.
How did you get it free?
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