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  #1  
Old 01-05-2011, 01:37 PM
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Join Date: Jan 2011
Location: Ft. Lauderdale, FL
Posts: 12
PhastPhil is on a distinguished road
What is your engine idle speed?

Without A/C On: ??

With A/C On: ??

Mine:
without: 550 rpm
with: 850 - 900 rpm

I'm asking because with the A/C On, the slow speed dynamics of the car change - the idle speed is high, and the car surges and requires excessive brake force while in normal stop and go traffic. Very difficult to modulate the brakes to make a smooth noseless-dive stop.

With the A/C OFF, it drives normally and I'm very happy with the slow speed dynamics. I've driven a few late model 3 Series that did NOT exhibit this and I'm wondering if this is specific to the X5 E70 - as my '04 E53 did NOT exhibit this at all. Asked dealer, but their response is: "idle speed set by engine management - we have no adjustments" Nice cop out.
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Phast Phil

328i Convert 2013 Ticket me RED. sometimes my wife lets me drive it LOL Tic'ed every option except Cold Weather PKG (we are in FL).
X5 2009 3.0 XDrive, Premium, Sat, ipod, Silver/Gray

Previous BMW's:
X5 2004 3.0
325e 1987 ("e" stood for exceptionally slow)
R1150 2001
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  #2  
Old 01-05-2011, 04:12 PM
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Join Date: May 2008
Location: Canada
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autoque is on a distinguished road
Does your RPM gauge read lower than what the pic is showing or higher without the AC on?
BTW it's normal for the RPM to go up slightly when the AC is turned on at least for the E70s. And it does somewhat numb the throttle response.
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  #3  
Old 01-05-2011, 05:18 PM
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Join Date: Jan 2011
Location: Ft. Lauderdale, FL
Posts: 12
PhastPhil is on a distinguished road
Pics w/tach w/and w/o AC

Hi autoque,
Thanks greatly for your reply and PIC.

Your tach show EXACTLY what mine does w/o the AC on. See pics below:

First Pic W/O AC - like yours

Second Pic WITH A/C on

Idle is same in Park or Drive (with a load on the engine)
Attached Images
  
__________________
------------------------
Phast Phil

328i Convert 2013 Ticket me RED. sometimes my wife lets me drive it LOL Tic'ed every option except Cold Weather PKG (we are in FL).
X5 2009 3.0 XDrive, Premium, Sat, ipod, Silver/Gray

Previous BMW's:
X5 2004 3.0
325e 1987 ("e" stood for exceptionally slow)
R1150 2001
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