1999 Pontiac GTP Shudders and stalls around 4000 rpm

#1

I just bought this car thinking it was a great deal. It has 152,000
miles on it, but ran great. I’ve never seen a car with this many
miles so clean and run so smooth. No knocks, ticks, nothing. I think
the driver’s CV is on the outs, but that’s not too bad. I brought it
home today and it ran fine until it started shuddering and cutting
back everytime the engine got to about 4000 rpm. In park and neutral
it starts to do it around 3500 and when you get to 4000 or higher it’s
really bad. The engine shudders violently and starts to die until you
let off it. I got a check engine light. The codes read a low input
on the MAF and bank 1 running lean. I checked to maf and cleaned it,
but didn’t want to replace it just yet. ($135). I drove it around
for a bit and the codes haven’t come back, but it’s still doing it.
Any ideas where to look?

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#2

"cduemig" <none (AT) 000 (DOT) com> wrote

Quote:

I just bought this car thinking it was a great deal. It has 152,000
miles on it, but ran great. I've never seen a car with this many
miles so clean and run so smooth. No knocks, ticks, nothing. I think
the driver's CV is on the outs, but that's not too bad. I brought it
home today and it ran fine until it started shuddering and cutting
back everytime the engine got to about 4000 rpm. In park and neutral
it starts to do it around 3500 and when you get to 4000 or higher it's
really bad. The engine shudders violently and starts to die until you
let off it. I got a check engine light. The codes read a low input
on the MAF and bank 1 running lean. I checked to maf and cleaned it,
but didn't want to replace it just yet. ($135). I drove it around
for a bit and the codes haven't come back, but it's still doing it.
Any ideas where to look?

How's the fuel filter?

#3

Can your scanner monitor the current MAF readings? Is the connector on the
MAF cracked or broken? Monitor it while running if possible to see if it is
reading and changing.

"cduemig" <none (AT) 000 (DOT) com> wrote

Quote:

I just bought this car thinking it was a great deal. It has 152,000
miles on it, but ran great. I've never seen a car with this many
miles so clean and run so smooth. No knocks, ticks, nothing. I think
the driver's CV is on the outs, but that's not too bad. I brought it
home today and it ran fine until it started shuddering and cutting
back everytime the engine got to about 4000 rpm. In park and neutral
it starts to do it around 3500 and when you get to 4000 or higher it's
really bad. The engine shudders violently and starts to die until you
let off it. I got a check engine light. The codes read a low input
on the MAF and bank 1 running lean. I checked to maf and cleaned it,
but didn't want to replace it just yet. ($135). I drove it around
for a bit and the codes haven't come back, but it's still doing it.
Any ideas where to look?

--
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Articles individually verified to usenet standards. Visit URL to contact
author/report abuse
Thread archive:
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#4

Sometimes the simplist answer is the correct one. I replaced the MAF
sensor and now it runs fine...

"80 Knight" wrote:

Quote:

"cduemig" <none (AT) 000 (DOT) com> wrote in message
news:985124_d0228fd619860e5b87a2bacf1d09a50f (AT) autoboardz (DOT) com...
I just bought this car thinking it was a great deal. It has
152,000
miles on it, but ran great. I've never seen a car with this
many
miles so clean and run so smooth. No knocks, ticks,
nothing. I think
the driver's CV is on the outs, but that's not too bad. I
brought it
home today and it ran fine until it started shuddering and
cutting
back everytime the engine got to about 4000 rpm. In park
and neutral
it starts to do it around 3500 and when you get to 4000 or
higher it's
really bad. The engine shudders violently and starts to die
until you
let off it. I got a check engine light. The codes read a
low input
on the MAF and bank 1 running lean. I checked to maf and
cleaned it,
but didn't want to replace it just yet. ($135). I drove it
around
for a bit and the codes haven't come back, but it's still
doing it.
Any ideas where to look?

How's the fuel filter?

--
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Articles individually verified to usenet standards. Visit URL to contact author/report abuse
Thread archive: http://www.AutoBoardz.com/1999-GTP-S...ict208026.html

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1999 Pontiac GTP Shudders and stalls around 4000 rpm

Pontiac Discussion of Pontiac Automobiles (alt.autos.pontiac)

1999 Pontiac GTP Shudders and stalls around 4000 rpm - 03-05-2007 , 02:29 AM

Re: 1999 Pontiac GTP Shudders and stalls around 4000 rpm - 03-05-2007 , 05:09 AM

Re: 1999 Pontiac GTP Shudders and stalls around 4000 rpm - 03-05-2007 , 12:16 PM

Re: Re: 1999 Pontiac GTP Shudders and stalls around 4000 rpm - 03-06-2007 , 01:28 AM