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 |
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