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Brake issue

This is a discussion on Brake issue within the General Help forums, part of the LSx Technical Help Section category; I am thinking about taking the car to the shop since i dont have much time to work on my ...

  1. #1
    Member Dewman's Avatar
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    Navy Blue Metallic
    2000 Camaro z28

    Brake issue

    I am thinking about taking the car to the shop since i dont have much time to work on my car but i want some ideas on what to look for in case its something i can fix in a short amount of time.

    My brakes seem to be acting different almost every time i hit the pedal, sometimes they are stiff but very responsive, other times they are squishy and the last option that is the worst is the pedal feels like there is a brick under it. The car still stops then but i almost have to stand on the pedal for it to stop. The car is not throwing any ABS or CEL lights. I have checked the brake booster and it seems to be holding vac. The fluid was a tad bit low but nothing too bad so i added a little more to it. Quick glance at the pads and those seem to be decent (needs a brake job over winter but overall not that bad) Manifold is down tight and all hoses are on tight and car fires on all 8. Car does have an exhaust leak but has had that all summer and this issue has only came about within the past 2 weeks.

    Any ideas?

    2000 Z28
    Cam/Intake/Boltons
    55,000 miles

  2. #2
    Smiles for 9.5 Years cammed goat's Avatar
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    Phantom Black Metallic
    2004 GTO M6

    My first question...has the fluid ever been flushed?

  3. #3
    Moderator Cutlass's Avatar
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    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    I'd have to actually drive the car to be 100% sure, but some of your symptoms seem to point to a bad master cylinder.

  4. #4
    Smiles for 9.5 Years cammed goat's Avatar
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    Phantom Black Metallic
    2004 GTO M6

    I was thinking the same thing. Maybe more time has to be spent diagnosing that master? Just weird.

  5. #5
    Member Dewman's Avatar
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    Navy Blue Metallic
    2000 Camaro z28

    mechanic says he thinks there is a vac leak or somthing because i only am getting 4/in of vac

  6. #6
    Moderator Cutlass's Avatar
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    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    how big is your cam? Big cams don't produce much vacuum

  7. #7
    Smiles for 9.5 Years cammed goat's Avatar
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    Phantom Black Metallic
    2004 GTO M6

    Quote Originally Posted by Cutlass View Post
    how big is your cam? Big cams don't produce much vacuum
    Kinda sounds like those writeups in GMHTP where folks have to add a "helper" booster to assist with the braking system after a cam swap.

  8. #8
    Member Dewman's Avatar
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    Navy Blue Metallic
    2000 Camaro z28

    The cam is not the problem, i have been driving it this way for 2 years now and never had a problem. I spent some time yesterday removing small things (valve covers, coil packs, plugs, wires, throttle body,vac hoses) and checking see if it was something else. I didnt remove my intake but i will be doing that in a few days to check that.

    Mechanic said worst case scenario is i may have burnt a valve. Not too worried though because i was on the fence about getting heads and that would be the deciding factor.

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    Last edited by Dewman; 09-12-2010 at 08:12 AM.

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