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Pontiac: Grand Prix GTP ABS question

  1. #1
    Dave
    Guest

    Grand Prix GTP ABS question

    I have a 1991 Pontiac Grand Prix GTP that is in exceptional condition,
    except that I have a flashing anti-lock light on the instrument panel. I
    took it to the dealer and they told me it had three trouble codes:

    1. ABS accumulator leaks down and ABS pump runs every time the brake pedal
    is applied.
    2. Right rear wheel speed sensor failure.
    3. Brake switch failure.

    I have been a technician for many years and know that three problems don't
    typically appear all at once, so this is most likely a single point failure.
    I was told by the dealer that a new accumulator would be $500, a new wheel
    speed sensor would be $125 and a new brake switch would be $125, all
    installed.

    This car has the 3.4L engine, has 119,500 miles on it, and it has been a
    very difficult car to work on, with very little room in the engine
    compartment. What I would like to know is this: How difficult would it be to
    replace the ABS accumulator on this car myself? I can get the part for
    wholesale, so it may be worth my time if it is not too difficult.

    Thanks,
    Dave Hetteen

    P.S. I once had the master cylinder replaced on this car, which I believe
    includes the ABS pump. I was lucky I had an extended warranty since the part
    was $2,093 and they got 5.5 hours labor to change it for a total of almost
    $2,750! That was when the car only had 60,000 miles on it.



  2. #2
    Jim.J
    Guest

    Re: Grand Prix GTP ABS question


    "Dave Hetteen" <com> wrote in message
    news:boeing.com... 
    failure. 
    to 
    part 
    of the time there is no problem it is just a program glitch
    if the abs portion of brakes isn't working they revert to standard brakes
    don;t worry you'll stop. They are very expensive to repair and may be cost
    prohibitive on an older car.

    Jim.J



  3. #3
    98
    Guest

    Re: Grand Prix GTP ABS question

    I had a similar error set. The sensors on the wheels needed cleaning after
    parking on freshly sealed blacktop on the sunny , 95 degree day.



    "Jim.J" <net> wrote in message
    news:wuWRb.17641$mts.net... 
    pedal 
    don't 
    wheel 
    be 
    believe 
    almost 



  4. #4
    Dave
    Guest

    Re: Grand Prix GTP ABS question

    Thanks for the tip. I'll try cleaning mine.
    Dave H.

    "98 Camaro" <net> wrote in message
    news:supernews.com... 
    after 


    the 
    brakes 
    cost 



  5. #5
    Dave
    Guest

    Re: Grand Prix GTP ABS question

    Thanks. I guess I should have mentioned that the ABS works; I found that out
    recently during a panic stop on the freeway in the rain here in Seattle. I
    really just want the "anti-lock" light to go out since I am now trying to
    sell the car. I also don't wish to disconnect it since this could be a
    potential safety issue and I don't want anything to do with that.
    Dave H.

    "Jim.J" <net> wrote in message
    news:wuWRb.17641$mts.net... 
    pedal 
    don't 
    wheel 
    be 
    believe 
    almost 



  6. #6
    shiden_Kai
    Guest

    Re: Grand Prix GTP ABS question


    "Dave Hetteen" wrote
     

    Common problem with these older systems. You should have
    no problems replacing the acumulator yourself if you are a tech.
    As you probably know, you need to pump the pedal with ignition
    off on these cars to relieve accumulator pressure. Don't go unscrewing
    that accumulator until you have done this. Other then that, it's just
    a real bitch to get access of the accumulator. I've done a few of
    these, but it was years ago.
     

    This should have nothing to do with the accumulator problem.
    Check the wiring to right rear sensor...I believe you can
    buy the harness from the body to the sensor. I've had
    a number of them go belly up.
     

    I'm not sure if it applies to this vehicle....but check
    to make sure that your high mount brake light bulbs
    are working. I know that sounds strange, but on
    some of these vehicles, the high mount brake light
    bulbs being burnt out would cause an ABS code,
    and I think it would show up as brake switch failure.
     
    part 

    That's the problem with this system. The ABS system can only
    be replaced (master and pump) other then the accumulator. Cars
    this old just aren't worth putting $3000 dollars into them.

    Ian



  7. #7
    shiden_Kai
    Guest

    Re: Grand Prix GTP ABS question


    "Jim.J" wrote
     

    On this system, this is not the case (if the abs portion of
    brakes aren't working they revert to standard brakes).
    These vehicles have a highly integrated ABS master cylinder,
    and boost pump. The pump provides power assist, and when
    you have accumulator problems, you can lose your assist.

    Ian



  8. #8
    Harry
    Guest

    Re: Grand Prix GTP ABS question,,IAN

    Ian wrote ; Cars this old just aren't worth putting $3000 into them.

    cough, cough, cough, cough !!!!


    : - )

    =========
    Harryface
    =========

    1991 Pontiac Bonneville LE, 3800 V6
    _~_~_~_~276,100 miles_~_~_ ~_~_








  9. #9
    Dave
    Guest

    Re: Grand Prix GTP ABS question

    Good point. It actually does require quite a bit of brake pedal pressure
    (for a car with power 4-wheel disc brakes) to stop this car.
    Dave

    "shiden_Kai" <com> wrote in message
    news:8rYRb.321710$.. 
    brakes 
    cost 




 

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