04 GT idle rattle??

Worth a try...

On 2005-01-26 19:33:53 -0500, A !> said:

> Switch to BP or Chevron for a week or so and see if it stops.
>
> On Thu, 27 Jan 2005 00:32:16 +0000, A wrote:
>
>> I get it when I use cheap gas, or right before it's time to change the oil.
>>
>> My 98 V6 mustang did it too.
>>
>> On Wed, 26 Jan 2005 18:20:28 -0500, Gumby wrote:
>>
>>> I have an 04 GT. It's in storage for the winter now, but I never had that
>>> happen. I really don't think it's normal.
>>>
>>>
>>> "japhar81" > wrote in message
>>> news:2005012611244943658%japhar81@gmailcom...
>>>> All,
>>>> My dealer claims this is 'normal' on my '04 Mustang GT... At idle,
>>>> every few seconds, what I can only describe as a shake goes through the
>>>> car. Basically, the whole car vibrates for about a second every 4 or 5
>>>> seconds. Its not a horrible shake, but pronounced enough that I can
>>>> easily feel it...
>>>>
>>>> Anyone else have this? Is it normal? If not, anyone know what I should
>>>> have my dealer look at while its still covered by warranty? I have a
>>>> feeling its normal right up until I have to pay to fix it, then its
>>>> gonna be a huge thing..

The car's Engine control module, ECU or ECM (whatever you want to call it)
runs firmware that runs out of a type of memory called "Flash". What they
normally will do is connect a programmer to the ALDL connector under the
dash and download new code to the calibration areas (usually just cals).
This does not mean that anything was defective with your ECU, just means
that after your car left the production plant, the calibrators found a
problem and have developed a fix.

John

"ja" > wrote in message
. ..
> THE COMPUTER!!
>
> heh heh,
>
> I think they just reprogram the entire thing
>
>
> "japhar81" > wrote in message
> news:2005012616202927544%japhar81@gmailcom...
> > Do you know what exactly they reprogrammed?
> >
> > On 2005-01-26 16:11:40 -0500, "mustangjoe" > said:
> >
> > >
> > > japhar81 wrote:
> > >> All,
> > >> My dealer claims this is 'normal' on my '04 Mustang GT... At idle,
> > >> every few seconds, what I can only describe as a shake goes through
> > > the
> > >> car. Basically, the whole car vibrates for about a second every 4 or
> > > 5
> > >> seconds. Its not a horrible shake, but pronounced enough that I can
> > >> easily feel it...
> > >>
> > >> Anyone else have this? Is it normal? If not, anyone know what I
> > > should
> > >> have my dealer look at while its still covered by warranty? I have a
> > >> feeling its normal right up until I have to pay to fix it, then its
> > >> gonna be a huge thing..
> > >
> > > My '03 GT Vert had a similar problem when I first bought it. I took
it
> > > back to the delaer and they re-programmed the computer. That took
care
> > > of it.
> > >
> > > Good Luck.
> >
> >
>
>

I have an 01 GT 5 speed and I notice that you can feel the engine vibrate
the car a little when you are stopped at a light. Actually my wife asked if
something was wrong with the car, when she first rode in it. The only
difference with what I feel is that in does not come and go every couple of
seconds.
Is your idle staying constant? What is your idle RPM? Is it manual or
automatic?

"japhar81" > wrote in message
news:2005012611244943658%japhar81@gmailcom...
> All,
> My dealer claims this is 'normal' on my '04 Mustang GT... At idle,
> every few seconds, what I can only describe as a shake goes through the
> car. Basically, the whole car vibrates for about a second every 4 or 5
> seconds. Its not a horrible shake, but pronounced enough that I can
> easily feel it...
>
> Anyone else have this? Is it normal? If not, anyone know what I should
> have my dealer look at while its still covered by warranty? I have a
> feeling its normal right up until I have to pay to fix it, then its
> gonna be a huge thing..
>

That's exactly what I get. It disappears when I use better gas (still 87
though)


On Thu, 27 Jan 2005 01:03:46 +0000, john.moyer wrote:

> I have an 01 GT 5 speed and I notice that you can feel the engine vibrate
> the car a little when you are stopped at a light. Actually my wife asked if
> something was wrong with the car, when she first rode in it. The only
> difference with what I feel is that in does not come and go every couple of
> seconds.
> Is your idle staying constant? What is your idle RPM? Is it manual or
> automatic?
>
> "japhar81" > wrote in message
> news:2005012611244943658%japhar81@gmailcom...
>> All,
>> My dealer claims this is 'normal' on my '04 Mustang GT... At idle,
>> every few seconds, what I can only describe as a shake goes through the
>> car. Basically, the whole car vibrates for about a second every 4 or 5
>> seconds. Its not a horrible shake, but pronounced enough that I can
>> easily feel it...
>>
>> Anyone else have this? Is it normal? If not, anyone know what I should
>> have my dealer look at while its still covered by warranty? I have a
>> feeling its normal right up until I have to pay to fix it, then its
>> gonna be a huge thing..
>>

Its a stick... But it definately comes and goes. Its like a shudder
goes through the whole thing, front to back, every 5 seconds. The rpms
do bounce just a hair at idle when it shudders. Not sure where my idle
is, would have to go check, and its f'ing cold out.

On 2005-01-26 20:12:49 -0500, A !> said:

> That's exactly what I get. It disappears when I use better gas (still 87
> though)
>
>
> On Thu, 27 Jan 2005 01:03:46 +0000, john.moyer wrote:
>
>> I have an 01 GT 5 speed and I notice that you can feel the engine vibrate
>> the car a little when you are stopped at a light. Actually my wife asked if
>> something was wrong with the car, when she first rode in it. The only
>> difference with what I feel is that in does not come and go every couple of
>> seconds.
>> Is your idle staying constant? What is your idle RPM? Is it manual or
>> automatic?
>>
>> "japhar81" > wrote in message
>> news:2005012611244943658%japhar81@gmailcom...
>>> All,
>>> My dealer claims this is 'normal' on my '04 Mustang GT... At idle,
>>> every few seconds, what I can only describe as a shake goes through the
>>> car. Basically, the whole car vibrates for about a second every 4 or 5
>>> seconds. Its not a horrible shake, but pronounced enough that I can
>>> easily feel it...
>>>
>>> Anyone else have this? Is it normal? If not, anyone know what I should
>>> have my dealer look at while its still covered by warranty? I have a
>>> feeling its normal right up until I have to pay to fix it, then its
>>> gonna be a huge thing..

I don't have any variation in my RPMs like you stated. I would possibly
have another dealer look at it. Something is not right.

"japhar81" > wrote in message
news:2005012620454264440%japhar81@Gmailcom...
> Its a stick... But it definately comes and goes. Its like a shudder
> goes through the whole thing, front to back, every 5 seconds. The rpms
> do bounce just a hair at idle when it shudders. Not sure where my idle
> is, would have to go check, and its f'ing cold out.
>
> On 2005-01-26 20:12:49 -0500, A !> said:
>
> > That's exactly what I get. It disappears when I use better gas (still 87
> > though)
> >
> >
> > On Thu, 27 Jan 2005 01:03:46 +0000, john.moyer wrote:
> >
> >> I have an 01 GT 5 speed and I notice that you can feel the engine
vibrate
> >> the car a little when you are stopped at a light. Actually my wife
asked if
> >> something was wrong with the car, when she first rode in it. The only
> >> difference with what I feel is that in does not come and go every
couple of
> >> seconds.
> >> Is your idle staying constant? What is your idle RPM? Is it manual or
> >> automatic?
> >>
> >> "japhar81" > wrote in message
> >> news:2005012611244943658%japhar81@gmailcom...
> >>> All,
> >>> My dealer claims this is 'normal' on my '04 Mustang GT... At idle,
> >>> every few seconds, what I can only describe as a shake goes through
the
> >>> car. Basically, the whole car vibrates for about a second every 4 or 5
> >>> seconds. Its not a horrible shake, but pronounced enough that I can
> >>> easily feel it...
> >>>
> >>> Anyone else have this? Is it normal? If not, anyone know what I should
> >>> have my dealer look at while its still covered by warranty? I have a
> >>> feeling its normal right up until I have to pay to fix it, then its
> >>> gonna be a huge thing..
>
>