Pontiac: Grand Prix GTP ABS question
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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
$2,750! That was when the car only had 60,000 miles on it.
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Re: Grand Prix GTP ABS question
"Dave Hetteen" <com> wrote in message
news:boeing.com...
failure.
to
part
of the time there is no problem it is just a program glitch
if the abs portion of brakes isn't working they revert to standard brakes
don;t worry you'll stop. They are very expensive to repair and may be cost
prohibitive on an older car.
Jim.J
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Re: Grand Prix GTP ABS question
I had a similar error set. The sensors on the wheels needed cleaning after
parking on freshly sealed blacktop on the sunny , 95 degree day.
"Jim.J" <net> wrote in message
news:wuWRb.17641$mts.net...
pedal
don't
wheel
be
believe
almost
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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
I
a
the
brakes
cost
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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
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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
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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
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Re: Grand Prix GTP ABS question,,IAN
Ian wrote ; Cars this old just aren't worth putting $3000 into them.
cough, cough, cough, cough !!!!
: - )
=========
Harryface
=========
1991 Pontiac Bonneville LE, 3800 V6
_~_~_~_~276,100 miles_~_~_ ~_~_
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Re: Grand Prix GTP ABS question
Good point. It actually does require quite a bit of brake pedal pressure
(for a car with power 4-wheel disc brakes) to stop this car.
Dave
"shiden_Kai" <com> wrote in message
news:8rYRb.321710$..
brakes
cost
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