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  1. #1

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    Brake pedal long travel

    As the title states, it seems to me like my brake pedal "dead zone" is huge. By dead zone I mean the distance in pedal travel from full released until I can feel the brakes apply. When they do grab, they grab really well for a 1st gen.

    I flushed the original fluid tonight with all new fresh DOT 3. Not sure if I thought it would help... but I was bored and it's really easy with a vacuum bleeder. It made the pedal a little firmer, but it didn't change the travel at all.

    I know boosters are common on this gen, but usually isn't that associated with a hard pedal? Because mine's not hard and it has plenty of assist. And we're talking vacuum assist on my car, non ABS.

    I'm not sure if a bad master would cause this, most of the time I replace masters for either external or internal leakage. I don't see any external leaks on the booster and my pedal doesn't drop when steady pressure is applied, it holds firm.

    Any ideas where to start?
    1991 Buick Regal GS - 121k - 3800 SI - 440T4/4T60 - White/Silver Two-Tone - Grey Sport Interior *DEAD*
    1991 Chevrolet Lumina Euro 3.1 - 116k - 3.1 - 440T4/4T60 - White - Blue Interior *SOLD*
    1997 Chevrolet Monte Carlo LS - 180k - 3100 - 4T60-E - Torch Red - Grey Interior *TRADED*
    2002 Pontiac Grand Prix SE - 195k - 3100 - 4T65-E - Teal - Charcoal Interior *SOLD*
    1993 Chevrolet Caprice Classic - 189k - 5.0 - 700R4 - Maroon - Maroon Interior

  2. #2

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    theres 3 causes of over travel I know of. the first is a mushy feel where they don't grab until far into the pedal travel. This is caused by air in the lines that has to compress first and allows the pedal to travel to far. The second is caused by excessive travel of the brake caliper pistons caused by overly worn brake pads. Your brake master cylinder can compensate a bit for worn pads but it gets to a point where they don't. If you check your pads I bet you find the inner pads worn excessively and the outer pads about 50%. third, you can also have old rubber brake lines that swell and add to the problem kind of like having air in the system. You can have a mixture of some or all these problems. I drove a firends truck years ago and his pedal almost hit the floor mat. I told him about it and he changed the pads and had the brakes bled and returned to normal. It got worse very slowly over time and he didn't even notice until I pointed it out.

  3. #3

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    Check. The brake flush pushes all air out of the system. Flushed 4 bottles of DOT3 through it. It's good.

    Check. Brakes are good. Front's have maybe 2k miles on them, rears are about 40-50% worn, and evenly. Rotors look OK.

    Minus. I know a couple brake hoses were showing some signs of cracking, but I didn't think it'd be bad enough to cause this much travel. I believe I'm going to change all the hoses and replace the rear calipers and rotors when I do the brake job on the rear. Money permitting.

    I know 1st gen's had booster issues. Could be a viable component to look into?
    1991 Buick Regal GS - 121k - 3800 SI - 440T4/4T60 - White/Silver Two-Tone - Grey Sport Interior *DEAD*
    1991 Chevrolet Lumina Euro 3.1 - 116k - 3.1 - 440T4/4T60 - White - Blue Interior *SOLD*
    1997 Chevrolet Monte Carlo LS - 180k - 3100 - 4T60-E - Torch Red - Grey Interior *TRADED*
    2002 Pontiac Grand Prix SE - 195k - 3100 - 4T65-E - Teal - Charcoal Interior *SOLD*
    1993 Chevrolet Caprice Classic - 189k - 5.0 - 700R4 - Maroon - Maroon Interior

  4. #4

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    You could also get the braided stainless steel flex lines to replace the rubber ones. I know I still have a set brand new I never used. I re found it when I moved in the summer.
    Jason -DD - 2008 Cadillac SRX4 Sport V8 - 1992 Pontiac Grand Prix SE Not starting - 1992 Pontiac Grand Prix GTP 5 Speed Getrag 284 -1992 Pontiac Grand Prix GTP Auto
    Car domain. All cars http://www.cardomain.com/id/Q-Ball
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    Sold - 2000 Chrysler Neon, 1999 Buick Regal GS

  5. #5

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    Are yours fit for a 1st gen? If so how much?
    1991 Buick Regal GS - 121k - 3800 SI - 440T4/4T60 - White/Silver Two-Tone - Grey Sport Interior *DEAD*
    1991 Chevrolet Lumina Euro 3.1 - 116k - 3.1 - 440T4/4T60 - White - Blue Interior *SOLD*
    1997 Chevrolet Monte Carlo LS - 180k - 3100 - 4T60-E - Torch Red - Grey Interior *TRADED*
    2002 Pontiac Grand Prix SE - 195k - 3100 - 4T65-E - Teal - Charcoal Interior *SOLD*
    1993 Chevrolet Caprice Classic - 189k - 5.0 - 700R4 - Maroon - Maroon Interior

  6. #6

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    When was the last time you ADJUSTED THE REAR BRAKES by applying the park brake???

  7. #7

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    A week or so ago? I'm not sure but I know it works. Didn't help the brakes though.
    1991 Buick Regal GS - 121k - 3800 SI - 440T4/4T60 - White/Silver Two-Tone - Grey Sport Interior *DEAD*
    1991 Chevrolet Lumina Euro 3.1 - 116k - 3.1 - 440T4/4T60 - White - Blue Interior *SOLD*
    1997 Chevrolet Monte Carlo LS - 180k - 3100 - 4T60-E - Torch Red - Grey Interior *TRADED*
    2002 Pontiac Grand Prix SE - 195k - 3100 - 4T65-E - Teal - Charcoal Interior *SOLD*
    1993 Chevrolet Caprice Classic - 189k - 5.0 - 700R4 - Maroon - Maroon Interior

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