What is proper idle speed for 2004 TJ 4.0L with auto?
 

I've got a 2004 Rubicon with the 4.0 engine and automatic
transmission. It has about 1000 miles on it. It runs great, but
after it is warmed up the idle goes down to about 400-450 RPM's on the
factory tach. At that speed it is a little rough, but not bad, and it
never stalls or does anything out of the ordinary. If I turn on the
AC or put it in neutral it speeds the idle back up to about 600. I
suppose I'm being over sensitive becuase this is my first new car for
a long time, but I'm used to seeing engines idle about 600 to 800.
Idle speed is controlled by the computer and I can't even find the
speed listed in the factory serice manual or on the sticker under the
hood.

Is what I'm seeing normal for the Wrangler?

Thanks for your time.

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

Lee did pass the time by typing:
> I've got a 2004 Rubicon with the 4.0 engine and automatic
> transmission. It has about 1000 miles on it. It runs great, but
> after it is warmed up the idle goes down to about 400-450 RPM's on the
> factory tach. At that speed it is a little rough, but not bad, and it
> never stalls or does anything out of the ordinary. If I turn on the
> AC or put it in neutral it speeds the idle back up to about 600. I
> suppose I'm being over sensitive becuase this is my first new car for
> a long time, but I'm used to seeing engines idle about 600 to 800.
> Idle speed is controlled by the computer and I can't even find the
> speed listed in the factory serice manual or on the sticker under the
> hood.
>
> Is what I'm seeing normal for the Wrangler?

Sounds normal for the I6, maby a bit low. The dealer can adjust your
the idle.

--
DougW

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

Lee did pass the time by typing:
> I've got a 2004 Rubicon with the 4.0 engine and automatic
> transmission. It has about 1000 miles on it. It runs great, but
> after it is warmed up the idle goes down to about 400-450 RPM's on the
> factory tach. At that speed it is a little rough, but not bad, and it
> never stalls or does anything out of the ordinary. If I turn on the
> AC or put it in neutral it speeds the idle back up to about 600. I
> suppose I'm being over sensitive becuase this is my first new car for
> a long time, but I'm used to seeing engines idle about 600 to 800.
> Idle speed is controlled by the computer and I can't even find the
> speed listed in the factory serice manual or on the sticker under the
> hood.
>
> Is what I'm seeing normal for the Wrangler?

Sounds normal for the I6, maby a bit low. The dealer can adjust your
the idle.

--
DougW

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

Lee did pass the time by typing:
> I've got a 2004 Rubicon with the 4.0 engine and automatic
> transmission. It has about 1000 miles on it. It runs great, but
> after it is warmed up the idle goes down to about 400-450 RPM's on the
> factory tach. At that speed it is a little rough, but not bad, and it
> never stalls or does anything out of the ordinary. If I turn on the
> AC or put it in neutral it speeds the idle back up to about 600. I
> suppose I'm being over sensitive becuase this is my first new car for
> a long time, but I'm used to seeing engines idle about 600 to 800.
> Idle speed is controlled by the computer and I can't even find the
> speed listed in the factory serice manual or on the sticker under the
> hood.
>
> Is what I'm seeing normal for the Wrangler?

Sounds normal for the I6, maby a bit low. The dealer can adjust your
the idle.

--
DougW

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

> Sounds normal for the I6, maby a bit low. The dealer can adjust your
> the idle.

Sounds low to me too - I believe it's supposed to idle at 600, but can't
find a source. I know it's a sign of the times, but does anyone else feel a
little sad knowing it's common place to have the dealer adjust something a
simple as the idle rpm.


____________________
HomeBrewer
76-81-85CJ7
All in one Jeep

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

> Sounds normal for the I6, maby a bit low. The dealer can adjust your
> the idle.

Sounds low to me too - I believe it's supposed to idle at 600, but can't
find a source. I know it's a sign of the times, but does anyone else feel a
little sad knowing it's common place to have the dealer adjust something a
simple as the idle rpm.


____________________
HomeBrewer
76-81-85CJ7
All in one Jeep

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

> Sounds normal for the I6, maby a bit low. The dealer can adjust your
> the idle.

Sounds low to me too - I believe it's supposed to idle at 600, but can't
find a source. I know it's a sign of the times, but does anyone else feel a
little sad knowing it's common place to have the dealer adjust something a
simple as the idle rpm.


____________________
HomeBrewer
76-81-85CJ7
All in one Jeep

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

HomeBrewer did pass the time by typing:
>> Sounds normal for the I6, maby a bit low. The dealer can adjust your
>> the idle.
>
> Sounds low to me too - I believe it's supposed to idle at 600, but can't
> find a source. I know it's a sign of the times, but does anyone else feel a
> little sad knowing it's common place to have the dealer adjust something a
> simple as the idle rpm.

A quick check of my 93 service manual shows 600 base with 800 if the AC is on.

--
DougW

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

HomeBrewer did pass the time by typing:
>> Sounds normal for the I6, maby a bit low. The dealer can adjust your
>> the idle.
>
> Sounds low to me too - I believe it's supposed to idle at 600, but can't
> find a source. I know it's a sign of the times, but does anyone else feel a
> little sad knowing it's common place to have the dealer adjust something a
> simple as the idle rpm.

A quick check of my 93 service manual shows 600 base with 800 if the AC is on.

--
DougW

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

HomeBrewer did pass the time by typing:
>> Sounds normal for the I6, maby a bit low. The dealer can adjust your
>> the idle.
>
> Sounds low to me too - I believe it's supposed to idle at 600, but can't
> find a source. I know it's a sign of the times, but does anyone else feel a
> little sad knowing it's common place to have the dealer adjust something a
> simple as the idle rpm.

A quick check of my 93 service manual shows 600 base with 800 if the AC is on.

--
DougW

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

Unfortunately, the 2004 service manual doesn't even show an idle speed
and says "all idle speed functions are controled by the IAC (Idle air
controller) motor through the PCM. It's the factory service manual,
and has no instructions at all for adjusting the idle.

I'll probably take it to the dealer for the first scheduled service
and mention it to them at that time, but it sounds like there's not
much that can be done unless there are deffective components.

Thanks for taking time to answer.

On Wed, 10 Nov 2004 06:34:46 -0600, "DougW"
<post.replies@invalid.address> wrote:

>HomeBrewer did pass the time by typing:
>>> Sounds normal for the I6, maby a bit low. The dealer can adjust your
>>> the idle.
>>
>> Sounds low to me too - I believe it's supposed to idle at 600, but can't
>> find a source. I know it's a sign of the times, but does anyone else feel a
>> little sad knowing it's common place to have the dealer adjust something a
>> simple as the idle rpm.
>
>A quick check of my 93 service manual shows 600 base with 800 if the AC is on.

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

Unfortunately, the 2004 service manual doesn't even show an idle speed
and says "all idle speed functions are controled by the IAC (Idle air
controller) motor through the PCM. It's the factory service manual,
and has no instructions at all for adjusting the idle.

I'll probably take it to the dealer for the first scheduled service
and mention it to them at that time, but it sounds like there's not
much that can be done unless there are deffective components.

Thanks for taking time to answer.

On Wed, 10 Nov 2004 06:34:46 -0600, "DougW"
<post.replies@invalid.address> wrote:

>HomeBrewer did pass the time by typing:
>>> Sounds normal for the I6, maby a bit low. The dealer can adjust your
>>> the idle.
>>
>> Sounds low to me too - I believe it's supposed to idle at 600, but can't
>> find a source. I know it's a sign of the times, but does anyone else feel a
>> little sad knowing it's common place to have the dealer adjust something a
>> simple as the idle rpm.
>
>A quick check of my 93 service manual shows 600 base with 800 if the AC is on.

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

Unfortunately, the 2004 service manual doesn't even show an idle speed
and says "all idle speed functions are controled by the IAC (Idle air
controller) motor through the PCM. It's the factory service manual,
and has no instructions at all for adjusting the idle.

I'll probably take it to the dealer for the first scheduled service
and mention it to them at that time, but it sounds like there's not
much that can be done unless there are deffective components.

Thanks for taking time to answer.

On Wed, 10 Nov 2004 06:34:46 -0600, "DougW"
<post.replies@invalid.address> wrote:

>HomeBrewer did pass the time by typing:
>>> Sounds normal for the I6, maby a bit low. The dealer can adjust your
>>> the idle.
>>
>> Sounds low to me too - I believe it's supposed to idle at 600, but can't
>> find a source. I know it's a sign of the times, but does anyone else feel a
>> little sad knowing it's common place to have the dealer adjust something a
>> simple as the idle rpm.
>
>A quick check of my 93 service manual shows 600 base with 800 if the AC is on.

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

Lee did pass the time by typing:
> Unfortunately, the 2004 service manual doesn't even show an idle speed
> and says "all idle speed functions are controled by the IAC (Idle air
> controller) motor through the PCM. It's the factory service manual,
> and has no instructions at all for adjusting the idle.
>
> I'll probably take it to the dealer for the first scheduled service
> and mention it to them at that time, but it sounds like there's not
> much that can be done unless there are deffective components.

Same thing with the 93, there is no base idle adjustment.
(although there is a set screw on the throttle body that
can be tweeked a tad. Thing is the IAC motor will simply
be driven shut and could stick)

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

Lee did pass the time by typing:
> Unfortunately, the 2004 service manual doesn't even show an idle speed
> and says "all idle speed functions are controled by the IAC (Idle air
> controller) motor through the PCM. It's the factory service manual,
> and has no instructions at all for adjusting the idle.
>
> I'll probably take it to the dealer for the first scheduled service
> and mention it to them at that time, but it sounds like there's not
> much that can be done unless there are deffective components.

Same thing with the 93, there is no base idle adjustment.
(although there is a set screw on the throttle body that
can be tweeked a tad. Thing is the IAC motor will simply
be driven shut and could stick)

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

Lee did pass the time by typing:
> Unfortunately, the 2004 service manual doesn't even show an idle speed
> and says "all idle speed functions are controled by the IAC (Idle air
> controller) motor through the PCM. It's the factory service manual,
> and has no instructions at all for adjusting the idle.
>
> I'll probably take it to the dealer for the first scheduled service
> and mention it to them at that time, but it sounds like there's not
> much that can be done unless there are deffective components.

Same thing with the 93, there is no base idle adjustment.
(although there is a set screw on the throttle body that
can be tweeked a tad. Thing is the IAC motor will simply
be driven shut and could stick)

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

Been there, done that.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

DougW wrote:
>
> Same thing with the 93, there is no base idle adjustment.
> (although there is a set screw on the throttle body that
> can be tweeked a tad. Thing is the IAC motor will simply
> be driven shut and could stick)

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

Been there, done that.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

DougW wrote:
>
> Same thing with the 93, there is no base idle adjustment.
> (although there is a set screw on the throttle body that
> can be tweeked a tad. Thing is the IAC motor will simply
> be driven shut and could stick)

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

Been there, done that.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

DougW wrote:
>
> Same thing with the 93, there is no base idle adjustment.
> (although there is a set screw on the throttle body that
> can be tweeked a tad. Thing is the IAC motor will simply
> be driven shut and could stick)

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

96 JGC
750 Rpm

Since it's starting again ;)


--
--
LE CLONE

279 Notre-Dame
Gatineau, Qc
J8P 1K6
(819) 643-0511
SANS FRAIS 1 888 643 0511

patrick@leclone.com
www.leclone.com
"L.W. (ßill) ------ III" <----------@cox.net> wrote in message
news:4192A376.5624E579@cox.net...
> Been there, done that.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> DougW wrote:
> >
> > Same thing with the 93, there is no base idle adjustment.
> > (although there is a set screw on the throttle body that
> > can be tweeked a tad. Thing is the IAC motor will simply
> > be driven shut and could stick)

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

96 JGC
750 Rpm

Since it's starting again ;)


--
--
LE CLONE

279 Notre-Dame
Gatineau, Qc
J8P 1K6
(819) 643-0511
SANS FRAIS 1 888 643 0511

patrick@leclone.com
www.leclone.com
"L.W. (ßill) ------ III" <----------@cox.net> wrote in message
news:4192A376.5624E579@cox.net...
> Been there, done that.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> DougW wrote:
> >
> > Same thing with the 93, there is no base idle adjustment.
> > (although there is a set screw on the throttle body that
> > can be tweeked a tad. Thing is the IAC motor will simply
> > be driven shut and could stick)

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

96 JGC
750 Rpm

Since it's starting again ;)


--
--
LE CLONE

279 Notre-Dame
Gatineau, Qc
J8P 1K6
(819) 643-0511
SANS FRAIS 1 888 643 0511

patrick@leclone.com
www.leclone.com
"L.W. (ßill) ------ III" <----------@cox.net> wrote in message
news:4192A376.5624E579@cox.net...
> Been there, done that.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> DougW wrote:
> >
> > Same thing with the 93, there is no base idle adjustment.
> > (although there is a set screw on the throttle body that
> > can be tweeked a tad. Thing is the IAC motor will simply
> > be driven shut and could stick)

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

forgot to say I6 4 Liter

> 96 JGC
> 750 Rpm
>
> Since it's starting again ;)

--
--
LE CLONE

279 Notre-Dame
Gatineau, Qc
J8P 1K6
(819) 643-0511
SANS FRAIS 1 888 643 0511

patrick@leclone.com
www.leclone.com
"Le CLone" <Le-clone@bellnet.ca> wrote in message
news:nQKkd.59$rN5.159593@news20.bellglobal.com...
> 96 JGC
> 750 Rpm
>
> Since it's starting again ;)
>
>
> --
> --
> LE CLONE
>
> 279 Notre-Dame
> Gatineau, Qc
> J8P 1K6
> (819) 643-0511
> SANS FRAIS 1 888 643 0511
>
> patrick@leclone.com
> www.leclone.com
> "L.W. (ßill) ------ III" <----------@cox.net> wrote in message
> news:4192A376.5624E579@cox.net...
> > Been there, done that.
> > God Bless America, ßill O|||||||O
> > mailto:-------------------- http://www.----------.com/
> >
> > DougW wrote:
> > >
> > > Same thing with the 93, there is no base idle adjustment.
> > > (although there is a set screw on the throttle body that
> > > can be tweeked a tad. Thing is the IAC motor will simply
> > > be driven shut and could stick)
>
>

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

forgot to say I6 4 Liter

> 96 JGC
> 750 Rpm
>
> Since it's starting again ;)

--
--
LE CLONE

279 Notre-Dame
Gatineau, Qc
J8P 1K6
(819) 643-0511
SANS FRAIS 1 888 643 0511

patrick@leclone.com
www.leclone.com
"Le CLone" <Le-clone@bellnet.ca> wrote in message
news:nQKkd.59$rN5.159593@news20.bellglobal.com...
> 96 JGC
> 750 Rpm
>
> Since it's starting again ;)
>
>
> --
> --
> LE CLONE
>
> 279 Notre-Dame
> Gatineau, Qc
> J8P 1K6
> (819) 643-0511
> SANS FRAIS 1 888 643 0511
>
> patrick@leclone.com
> www.leclone.com
> "L.W. (ßill) ------ III" <----------@cox.net> wrote in message
> news:4192A376.5624E579@cox.net...
> > Been there, done that.
> > God Bless America, ßill O|||||||O
> > mailto:-------------------- http://www.----------.com/
> >
> > DougW wrote:
> > >
> > > Same thing with the 93, there is no base idle adjustment.
> > > (although there is a set screw on the throttle body that
> > > can be tweeked a tad. Thing is the IAC motor will simply
> > > be driven shut and could stick)
>
>

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

forgot to say I6 4 Liter

> 96 JGC
> 750 Rpm
>
> Since it's starting again ;)

--
--
LE CLONE

279 Notre-Dame
Gatineau, Qc
J8P 1K6
(819) 643-0511
SANS FRAIS 1 888 643 0511

patrick@leclone.com
www.leclone.com
"Le CLone" <Le-clone@bellnet.ca> wrote in message
news:nQKkd.59$rN5.159593@news20.bellglobal.com...
> 96 JGC
> 750 Rpm
>
> Since it's starting again ;)
>
>
> --
> --
> LE CLONE
>
> 279 Notre-Dame
> Gatineau, Qc
> J8P 1K6
> (819) 643-0511
> SANS FRAIS 1 888 643 0511
>
> patrick@leclone.com
> www.leclone.com
> "L.W. (ßill) ------ III" <----------@cox.net> wrote in message
> news:4192A376.5624E579@cox.net...
> > Been there, done that.
> > God Bless America, ßill O|||||||O
> > mailto:-------------------- http://www.----------.com/
> >
> > DougW wrote:
> > >
> > > Same thing with the 93, there is no base idle adjustment.
> > > (although there is a set screw on the throttle body that
> > > can be tweeked a tad. Thing is the IAC motor will simply
> > > be driven shut and could stick)
>
>

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

A friend had a similar problem with his 2004 Grand Cherokee 4.0 and
automatic, only his seemed to be idling too fast and ran rough when stopped
with the brake applied. Turns out there was a service bulletin for his that
specified the idle should be set to "744 RPM" - yes you read right,
"744"!!). That little operation fixed his complaint.



"Lee" <tljb1@cox.net> wrote in message
news:ksv2p0haidpppnruvkgtltbdblcuchpge1@4ax.com...
> I've got a 2004 Rubicon with the 4.0 engine and automatic
> transmission. It has about 1000 miles on it. It runs great, but
> after it is warmed up the idle goes down to about 400-450 RPM's on the
> factory tach. At that speed it is a little rough, but not bad, and it
> never stalls or does anything out of the ordinary. If I turn on the
> AC or put it in neutral it speeds the idle back up to about 600. I
> suppose I'm being over sensitive becuase this is my first new car for
> a long time, but I'm used to seeing engines idle about 600 to 800.
> Idle speed is controlled by the computer and I can't even find the
> speed listed in the factory serice manual or on the sticker under the
> hood.
>
> Is what I'm seeing normal for the Wrangler?
>
> Thanks for your time.
>
>

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

A friend had a similar problem with his 2004 Grand Cherokee 4.0 and
automatic, only his seemed to be idling too fast and ran rough when stopped
with the brake applied. Turns out there was a service bulletin for his that
specified the idle should be set to "744 RPM" - yes you read right,
"744"!!). That little operation fixed his complaint.



"Lee" <tljb1@cox.net> wrote in message
news:ksv2p0haidpppnruvkgtltbdblcuchpge1@4ax.com...
> I've got a 2004 Rubicon with the 4.0 engine and automatic
> transmission. It has about 1000 miles on it. It runs great, but
> after it is warmed up the idle goes down to about 400-450 RPM's on the
> factory tach. At that speed it is a little rough, but not bad, and it
> never stalls or does anything out of the ordinary. If I turn on the
> AC or put it in neutral it speeds the idle back up to about 600. I
> suppose I'm being over sensitive becuase this is my first new car for
> a long time, but I'm used to seeing engines idle about 600 to 800.
> Idle speed is controlled by the computer and I can't even find the
> speed listed in the factory serice manual or on the sticker under the
> hood.
>
> Is what I'm seeing normal for the Wrangler?
>
> Thanks for your time.
>
>

Re: What is proper idle speed for 2004 TJ 4.0L with auto?
 

A friend had a similar problem with his 2004 Grand Cherokee 4.0 and
automatic, only his seemed to be idling too fast and ran rough when stopped
with the brake applied. Turns out there was a service bulletin for his that
specified the idle should be set to "744 RPM" - yes you read right,
"744"!!). That little operation fixed his complaint.



"Lee" <tljb1@cox.net> wrote in message
news:ksv2p0haidpppnruvkgtltbdblcuchpge1@4ax.com...
> I've got a 2004 Rubicon with the 4.0 engine and automatic
> transmission. It has about 1000 miles on it. It runs great, but
> after it is warmed up the idle goes down to about 400-450 RPM's on the
> factory tach. At that speed it is a little rough, but not bad, and it
> never stalls or does anything out of the ordinary. If I turn on the
> AC or put it in neutral it speeds the idle back up to about 600. I
> suppose I'm being over sensitive becuase this is my first new car for
> a long time, but I'm used to seeing engines idle about 600 to 800.
> Idle speed is controlled by the computer and I can't even find the
> speed listed in the factory serice manual or on the sticker under the
> hood.
>
> Is what I'm seeing normal for the Wrangler?
>
> Thanks for your time.
>
>