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.

 

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

 

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

 

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

 

> 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

 

> 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

 

> 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

 

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

 

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

 

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