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88 crx hf brake problem

Discussion in 'Civic and CRX - EF' started by kricket3000, Jul 10, 2010.

  1. kricket3000

    kricket3000 New Member

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    I got the lines bleed and i get a real good pedal but as soon as i start the car the pedal goes straight to the flood!! turn the car off and the pedal comes right back. The car has sat with the brake lines open for about two years so i knew i would have some problems, any ideas???:confused:
     
  2. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    bad seals?
    bad booster?

    Check booster operation per service manual
    Flush entire system
    Rebuild master cylinder

    I'd do it in that order- cheapest/easiest to most expensive.
     
  3. kricket3000

    kricket3000 New Member

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    it makes no sense, when i have the car off i get a great pedal, when the car is on the pedal goes straight to the floor.
     
  4. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    That's what the booster is supposed to do... but not go all the way to the floor. There's more to testing the brake booster than that though- your owner's manual should have some basic troubleshooting, and the service manual definitely has the information in it too.
     
  5. kricket3000

    kricket3000 New Member

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    tried everything the manual said, according to all the test it says its the master cylinder or wheel cylinder.wheel cylinders look good i had another master cylinder and tried it and it did the same, i guess I'll try booster next?:confused:
     
  6. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    Yup, go for the booster next. Check all your vacuum lines too.
     
  7. kricket3000

    kricket3000 New Member

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    OK so i put another booster on and nothing changed, still great pedal when car is off but turn the car on and straight to the floor!!! other than the big vac line with the check valve in it should i check? think i might have an air pocket in there some were, i ran a whole bottle threw the lines. the wheel cylinder are fine dry as a bone. its starting to really piss me off!!!
     
  8. K2e2vin

    K2e2vin Senior Member

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    How are you bleeding it? Also, did you bench-bleed the master cylinder(pretty much bleed the master cylinder before bleeding the system)?
     
  9. kricket3000

    kricket3000 New Member

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    yes i bench bleed, bleeding it with a long tube in a bottle, tubes in 3'' of brake fliuld.
     
  10. K2e2vin

    K2e2vin Senior Member

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    Only other thing I can think of is bad seal in the master cylinder but usually you can feel it lose pressure(or at least in my case it's been like this.). You're not losing any fluid are you? Also, when it goes to the floor; have you tried pumping it to try to build pressure?
     
  11. kricket3000

    kricket3000 New Member

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    no I'm not losing any fluid that i can see. i can pump it up and get pressure with the can off when car is on i could probably blow on the pedal and it would go to the floor!
     
  12. GlassHeadlights

    GlassHeadlights West West Yall

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    My CRX did this too!

    The caliapers split in two pieces and the pins MUST be greased well. My caliapers siezed togther and it did EXACTLY what you are describing. It takes no time to pop off the 12mm bolt and grease up the pins anyway.

    Hope it helps. :)
     
  13. kricket3000

    kricket3000 New Member

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    thanks man, they are newer calipers and i have had them apart already
     
  14. kricket3000

    kricket3000 New Member

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    could it be the prop valve?
     
  15. kricket3000

    kricket3000 New Member

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    rebleed them and i got an ok pedal i guess, also i never said it but the front brakes are from a DA. do they hold more fluid than the stock HF ones, do i need to change to a DA MC and booster to get a firmer pedal?
     
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