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Cant bleed the brakes, no fluid comes out!

Posted by Nico_, Jul 23, 2019

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  1. Nico_

    Nico_ Proven Member

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    Hey, i just took my car to a shop and we were manualing trying to change the brake fluid and then bleed it. my car is a 95 gsx with abs. We started the car, and then opened the bleeder valves on the calipers in the correct order, and the fluid wouldnt come out, of any calipers, just a few drops, no matter how hard i was pushing the brake pedal. also, the pedal would not low down. it always came back up. I dont know if it matters or not but my abs unit does not work, the abs light is on. The brakes used to work somewhat normal, only a little weak, and now it works like sh**, but still works.
    Any ideas?
     

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    1995 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
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  2. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

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    If it were mine I'd be swapping out the ABS unit for a non-abs setup. ABS is good.....when it works but a straight shot from the master cylinder to the wheel cylinders makes me feel better when I have to use that pedal. :)
     

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  3. ThunderChild

    ThunderChild Supporting VIP

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    Sounds like the holes for the bleeders are rusted shut or something. Did the shop not offer any diagnosis or information?
     

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  4. Nico_

    Nico_ Proven Member

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    they removed the bleeder completly, and nothing came out on the rear.Only a few drops in the front, i'm thinking the proportioning valve is bad or there's air in the system.
     

    877  9

    1995 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
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  5. Nico_

    Nico_ Proven Member

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    it's on my to do list, but right now i just want to know why i can't bleed it. abs shouldnt be a problem in this case
     

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    1995 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
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  6. silvreclips

    silvreclips Proven Member

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    I've had to poke something in the bleeder holes before to get fluid flowing
     
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  7. ThunderChild

    ThunderChild Supporting VIP

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    This. I'd bet the holes on the caliper itself are blocked.
    And the abs won't prevent your from bleeding, but the solenoid pack itself won't be bled until you actuate the solenoids while bleeding. It's a PITA.

    Check the calipers, if needed, pull one off and see if fluid flows freely from the line then. If so, calipers are clogged.
     

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  8. tk106

    tk106 Supporting Member

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    See what happens when you remove the line off the caliper.
     

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  9. rabenne

    rabenne Proven Member

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    If they removed the bleeders and got no flow its not an issue of poking thru rust in the bleeder screw. I am confused about your "the pedal would not low down" statement. What are you trying to say here? the pedal goes way down? The pedal does not go down? Please try to reword this...
     

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  10. Nico_

    Nico_ Proven Member

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    what i was trying to say is that the pedal behaves normally, even with the bleeder opened. i still have pressure. they did remove the bleeder and the fluid still wouldnt come out... there was no rust, it was very easy to remove. i'm leaned towards the proportioning valve being stuck
     

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    1995 Mitsubishi Eclipse GSX
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  11. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

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    Crack a line at the valve. The pedal should go down. It has a blockage somewhere.
     

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  12. pauleyman

    pauleyman DSM Wiseman

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    I've seen lines collapse also. You can crack each fitting working from the caliper back. When it starts moving you found your blockage.
     

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  13. Nico_

    Nico_ Proven Member

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    Thanks for the help guys, what i think is the weirdest part is that the fluid would not come out of any of the 4 bleeder, it would drop a little from the front, which makes me think the clog might be before the fluid gets to the proportion valve. But i'll clean every fitting i can find tommorrow
     

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    1995 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
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  14. pauleyman

    pauleyman DSM Wiseman

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    I don't think it's weird at all. I just did a brake job on a ford and the rubber lines were so bad they kept the brakes applied HARD. Same issue, No fluid. Replaced the lines, no more problem.
     

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  15. motomattx

    motomattx Proven Member

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    Take a blow gun, open a bleeder valve and blow high pressure air back through the proportioning valve, sounds like its slammed shut possibly.
     

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  16. ThunderChild

    ThunderChild Supporting VIP

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    If none would bleed fluid when cracked, I'll go with a faulty bias valve or rusted ports.

    Still recommend picking at the ports of the calipers or compressed air back-blowing them.
     

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  17. jensenpitt

    jensenpitt Probationary Member

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  18. Nico_

    Nico_ Proven Member

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    Thanks guys, here is an update: i took the car to another shop, and they managed to bleed the drivers side, front and rear. but there was still no brake fluid coming out of the bleeders on the passenger side, and also the brakes on that side are not working, front and rear, any ideas? as far as i know the proportional valve divides the brakes front and rear, and not by side. and the abs lines have fluid on them, we checked that. Any ideas? Anyway i left my car there so they could check the lines, i have no time or a lift to do that on my own right now
     

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    1995 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
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  19. Nico_

    Nico_ Proven Member

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    Well looks like my front passenger side brake hose was clogged, and the proportioning valve is clogged was well, so that explain why no fluid. the front problem is solved, but i will have to ride without a proportioning valve for a while, is there any real danger in that?
     

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    1995 Mitsubishi Eclipse GSX
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  20. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

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    I was going to quote Paul, in the collapsed line thing. My old 67 Camaro did the same thing he talked about. It let fluid in but not back and kept my brakes applied. I had to crack the line at the cylinder to let the pressure off.
    New line (well 2 new lines, both sides) and it is all good.
     

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  21. pauleyman

    pauleyman DSM Wiseman

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    Did you really just ask that?
     

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  22. Evo joe

    Evo joe Probationary Member

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    Good to hear that you figured the problem out but I would replace the Proportioning valve! Just so you have the right brake bias front to rear.
     

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  23. Nico_

    Nico_ Proven Member

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    well its either that or leave the car in the garage for two months or so, because it takes a long time to shipp it to brazil, customs here are a pain in the ass unfortunately. I know what the valve does and obviously i wont be driving it hard or slamming the brakes while i wait for the new parts to arrive.
     

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    1995 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
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  24. Nico_

    Nico_ Proven Member

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    yes i will do that. we managed to join the lines with fittings and a little bending, but it's all reversible. just have to wait for the news parts to arrive. it's a lot easier to do the right thing when you have the parts available, which is not the case here :/ if i took my car to a mitsubishi dealership i'm pretty sure they would ask what brand is the car. we have zero oem car parts in stock, and the autoparts store only sell chinese crap so... yeah
     

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    1995 Mitsubishi Eclipse GSX
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