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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 02-07-2013, 07:55 PM
5series92 5series92 is offline
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Location: Maryland
 
Join Date: May 2012
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Mein Auto: 540i sport
Is my idle too low?..

Just wondering if anybody thinks my idle is lower than normal

Please let me know what you think and where your car idles when engine is at operating temperature
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  #2  
Old 02-07-2013, 08:14 PM
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Dking078 Dking078 is offline
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Location: Southern California
 
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Mein Auto: 2003 BMW 540i
Is your AC on?

If not, then it's too low.

Ac on 650rpm
Ac off 500rpm (which is the small white line in your pic)
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  #3  
Old 02-07-2013, 09:52 PM
5series92 5series92 is offline
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Location: Maryland
 
Join Date: May 2012
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Mein Auto: 540i sport
AC is off. There are no codes or ses light why could it be that low? It seems to only idle that low when warm
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  #4  
Old 02-07-2013, 11:17 PM
isaac540 isaac540 is offline
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Location: Nashville, TN
 
Join Date: Aug 2012
Posts: 36
Mein Auto: 1997 540i
That's normal for when the A/C is off. Turning the A/C on will boost it to around 650. Unless your engine is idling rough or anything else unusual, this shouldn't be a problem.
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  #5  
Old 02-08-2013, 04:18 AM
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Topaz540i Topaz540i is offline
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Mein Auto: 2001 540i/6
Your pic is at 500 whixh is normal. Mine idles at a rock solid 500 on the gauge even though the hand scanners shows its actually closer to 580 in reality.
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