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Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 72blazer4x4, Apr 15, 2001.

  1. 72blazer4x4

    72blazer4x4 Registered Member

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    i just put a new intake manifold on and driving down the street and my brakes went out. i checked the master cylinder and its full and there doesnt seem to be any leaks anywhere. the only thing i know of thats wrong is that i have really low transmission fluid, could that cause this?

    jeremy
     
  2. 77GMC15

    77GMC15 1/2 ton status

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    Just sell it to me for really cheap and I will let you ride in it occasionally.

    I wish i had some custom J. Norman exhaust [​IMG]

    Never call a man a fool; borrow from him. [​IMG]
     
  3. '73 K5

    '73 K5 1/2 ton status

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    Do you have power brakes?

    '73 K5
    Chevy good...Ford bad
     
  4. pr1aw

    pr1aw 1/2 ton status

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    If you have vaccum assisted brakes there might be a vaccum leak from the intake. Throw a vaccum gage on it and see what it reads. It should read 16 or above unless you have an aggressive cam in it. But even with the vaccum leak your brakes should work, its just going to take bit more effort. The low tranny fluid will not have anything to do with the brakes.
     
  5. 72blazer4x4

    72blazer4x4 Registered Member

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    yeah i have power brakes, and where do i hook the vacuum thing up to?

    jeremy
     
  6. Chris Demartini

    Chris Demartini 1/2 ton status

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    <font color=blue>What do you mean by "went out"? Did the pedal sink to the floor? Is the brakelight on? I think when you put the manifold in you might have hook up the vac lines for the power booster wrong.</font color=blue>

    [​IMG]
     
  7. 72blazer4x4

    72blazer4x4 Registered Member

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    i had driven it before with the new intake on with no brake problems, then i took it for a drive again and i hit the brakes and its stiff but i dont stop and had to hit the parking brake.

    jeremy
     
  8. BadDog

    BadDog SOL Staff Member Super Moderator Author

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    Sounds like you lost vacuum to the power brake booster. That will make your brakes really stiff but, if you really stand up on them, they should still stop you. If it won't move at all or apply any brakes, maybe something in the linkage is jammed. I'll bet on the vacuum loss though.

    Bad Dog

    85 K30 CUCV, 350 TBI, TH400, NP205, D60/C14, 4.56 Locked
    Soon: 4" lift, 40" tires, massive cutting, shorter wb and rear overhang.
     

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