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Car Forum / Pontiac / Pontiac Cars / February 2009

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Subject: 2000 GTP - Odd problems

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Richard Kruse - 04 Feb 2009 05:52 GMT
(Quote begins:)
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>The car has 88k miles on it. Never ran very hard.
>
>Problem 1
>About 2 years ago it started surging when I put it under a little
>load. Like climbing a hill at freeway speeds. The tach will bounce 100
>to 500 RPM down. ( I don't feel it is the trans, it would bounce up if
>the torque converter was slipping). Now it does it at speeds as low as
>30 when climbing a hill. If I step further down on the throttle to
>increase my speed, it feels good.
>
>I've had it the shop 3 times.
>
>1st time - 11/9/07. Mileage 74k. Major fuel service. Flush, clean
>injectors, New fuel filters.
>This did not help.
>
>2nd time - 11/12/07. Found carbon tracking on the wires.  Replaced
>wires, a couple of coils, and the plugs.
>
>3rd time
>They could find nothing wrong. No charge for that visit
>
>This worked for about a year. Now it is doing it again.  Grr
>
>Problem 2
>The exterior temp readout has went wacky. It will read 126 deg. When
>it is in this state, the only way I can get heat is if I turn the temp
>to the max (90) Then it roasts me out.
>Sometimes, it will start high, then come down to the ambient
>temperature, other times, not. If it drops the readout to 100 or less,
>the temp control works just fine.
>This is driving me buggy
>
>Any Ideas?  I really like the car, but am considering dumping it
>
>Email address is valid if you dump the obvious
>
>Thanks for any ideas you can provide
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
(Quote ends.)

No solution, only a report that I have exactly the same problem in a 2002 G-P
GT. Surge at highway speed, under light acceleration, goes away, plenty of power
if I stomp on it.

It's been worse than ever this Winter - if anything, cool weather seems to make
it worse.

Pretty much the same story... Car runs perfectly otherwise, no check-engine
light ever. Parts replaced to no effect include plugs, TPS, EGR, oxy. sensor,
filters, etc. Local dealer and mechanic relative all stumped!

I'll be watching closely for any hints here!

Signature

==Richard Kruse== correct email: rkruse at mtelco dot net

none@none.com - 04 Feb 2009 13:52 GMT
>(Quote begins:)
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[quoted text clipped - 51 lines]
>
>I'll be watching closely for any hints here!

It's nice to know that I am not the only one with this issue.
My dealer is stumped also. Last time I took it in, they just
determined that the trans was searching for the right gear.  NOT!
Jim Northey - 05 Feb 2009 00:50 GMT
> (Quote begins:)
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
[quoted text clipped - 52 lines]
>
> I'll be watching closely for any hints here!

Mine would surge and stall at low speed,  been a few years so don't
remember if it did it at high speed. Plus it was only a few days old. (
bought used in 05). It was the mas that was goofed up . Similar symptoms so
maybe a cleaning or replace. I don't remember a cel coming on at the time.
Good luck
Jim
Oh it's a 3800 GT
none@none.com - 06 Feb 2009 21:00 GMT
>> (Quote begins:)
>> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
[quoted text clipped - 60 lines]
> Jim
> Oh it's a 3800 GT

What is the mas? I figured out the cel "check engine light"
I'm open to any ideas,
Mine does it at low speed pulling a hill, and freeway speeds pulling a
hill. I suspect it on flat ground, but it is not as noticable
Thanks for your input.
80 Knight - 06 Feb 2009 21:45 GMT
>>> (Quote begins:)
>>> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
[quoted text clipped - 69 lines]
> hill. I suspect it on flat ground, but it is not as noticable
> Thanks for your input.

I can recall a MAF Mass Air Flow sensor, but not a MAS.
Jim Northey - 07 Feb 2009 07:57 GMT
>>>> (Quote begins:)
>>>> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
[quoted text clipped - 73 lines]
>
> I can recall a MAF Mass Air Flow sensor, but not a MAS.

Was a few years ago . I questioned it at the time and asked if it was the
same thing as a map (manifold air pressure sensor) and was told much the
same. So have to say it is manifold air sensor  or manifold air pressure
sensor.
Sorry that's the best I can do as that was all the repair sheet said was
replaced mas.
Hope it was of some help
Jim
none@none.com - 07 Feb 2009 14:40 GMT
I'll give it a try when I get home from Chile.
Thanks everyone

>>>>> (Quote begins:)
>>>>> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
[quoted text clipped - 82 lines]
> Hope it was of some help
> Jim
DMHenrie - 07 Feb 2009 15:55 GMT
Problem 2, there is a temperature sensor under the front bumper. You can get
to the sensor from under the front of car, and dont really need to remove
anything.
That is bad.

> (Quote begins:)
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
[quoted text clipped - 52 lines]
>
> I'll be watching closely for any hints here!
none@none.com - 08 Feb 2009 15:37 GMT
Would it be sporatic in it's readings? Like sometimes way off the
mark, and other times right on the real temp?
I'll take a look today before it starts raining.

Thanks

>Problem 2, there is a temperature sensor under the front bumper. You can get
>to the sensor from under the front of car, and dont really need to remove
[quoted text clipped - 57 lines]
>>
>> I'll be watching closely for any hints here!
RKELC - 14 Feb 2009 22:48 GMT
WWW.GPONA.COM

You may find your answer there!!! ;o)

> Would it be sporatic in it's readings? Like sometimes way off the
> mark, and other times right on the real temp?
[quoted text clipped - 66 lines]
>>>
>>> I'll be watching closely for any hints here!
 
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