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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 7 Series & 8 Series > 7 Series - E65 / E66 (2002 - 2008)

7 Series - E65 / E66 (2002 - 2008)
Discussion of BMW's 4th generation E65/E66 7 Series flagship. The E65 generated much controversy, due to its radical styling and iDrive user difficulties. Nonetheless, the E65 broke records to become the best-selling 7-series iteration ever, especially after its 2005 facelift.

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Old 03-09-2009, 04:39 PM
bmwperf bmwperf is offline
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Location: Walnut Creek, California
Join Date: Mar 2009
Posts: 4
Mein Auto: 2006 BMW 750Li
Rough idle at start up

When ever I start my car after sittign for awhile, it idles at about 1,000 and will rev up to 1,200 and back down for the first 10-20 seconds then will purr nice, but sounds like **** untill then. Any quick fixed on this or is it a 7 series thing. Its a 2006 750Li with 52,000 miles.
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Old 03-09-2009, 05:17 PM
becool becool is offline
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Location: ill
Join Date: Dec 2008
Posts: 37
Mein Auto: 750li
I took mine to dealer for this problem, after they did "something" it has improved but not completely fixed. However they raised my IDLE by 50 RPM and now my car idles at about 550 rpm rather than about 500 rpm. My recommendation, take it to the dealer and after that get use to it.
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Old 03-09-2009, 07:15 PM
Dr Feelgood Dr Feelgood is offline
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Location: tx
Join Date: Apr 2008
Posts: 51
Mein Auto: m6,750li,mz4,545i,e46 m3,
I had that issue on my 07 with 20k miles.....took it to the dealer and had the master tech do a reprogram of some sort but it fxd the problem
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Old 03-09-2009, 08:07 PM
johndade johndade is offline
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Location: chicago
Join Date: Nov 2006
Posts: 1,663
Mein Auto: 2002 bmw 745li
I thought the first 20 seconds it was suppose to run a little high then tapper down to 500 at least mine does. Someone before here stated that its the air pump that causes it to run rough first 20 seconds or so. I would search but i wouldnt consider it a problem.
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Old 03-09-2009, 09:58 PM
ImolaMMM's Avatar
ImolaMMM ImolaMMM is offline
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Location: Atlanta
Join Date: Feb 2008
Posts: 2,087
Mein Auto: 2013 750 Li


2013 750 Li Alpine White/Black|M-Sport Pkg|LED Lighting Pkg|Exec Pkg|Drivers Assist Pkg|760 Exhaust Tips|Painted Calipers|CQuartz Finest

2008 Toyota Sequoia Platinum--Arctic Frost Pearl/Red Rock

2006 750 Li-Retired
2006 330i-Retired
2002 M3-Retired
2000 323Ci-Retired
1991 M3-Retired

Last edited by ImolaMMM; 03-09-2009 at 10:02 PM. Reason: BmwTech answers the query
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Old 11-12-2009, 12:35 AM
artisthand artisthand is offline
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Location: California
Join Date: Nov 2009
Posts: 10
Mein Auto: BMW E60
try this it's easy to do only 5 minutes and solved all your rough idle and check engine light problems on your (2000-2009) later or newer yes! all BMW E60, X3, X5, 325i,330i,335i,525i,528i,530i,535i,... check out the manifold adjuster Google this up.

That appears to have been the problem the whole time. This is what caused the check engine light and O2 sensor fault and misfire codes. listed below are the codes that are caused by a broken Intake Manifold Runner Valve/Adjuster Unit!!!

Ignore these codes after changing your broken or damage Intake Manifold Runner Valve/adjuster Unit these codes will be gone.

P0171 = Fuel Trim, Bank1 System too Lean

P0174 = Fuel Trim, Bank2 System too Lean

P0300 = Random/Multiple Cylinder Misfire Detected

P0313 = Misfire Detected Low Fuel Level

P0741 = Torque Converter Clutch Circuit Performance or Stuck Off

P1083 = Fuel Control Mixture Lean (Bank 1 Sensor 1)

P1085 = Fuel Control Mixture Lean (Bank 2 Sensor 1)

P1342 = Misfire During Start Cylinder 1

P1346 = Misfire During Start Cylinder 3

P1348 = Misfire During Start Cylinder 4

P1350 = Misfire During Start Cylinder 5

P1352 = Misfire During Start Cylinder 6

The adjuster's part description on www.ecstuning.com
Air adjustment unit controls the path of the air in the intake manifold, allowing either a shorter or longer runner length. A common source of trouble causing low RPM sluggishness and accompanied by a clicking sound from the engine bay. The exact symptoms.

Location on driver's side. I already removed the two T40 bolts (upper right and lower middle.) Then simply pull the adjuster unit straight back out towards you. ( 5 minutes)
After removing the manifold adjuster you can also clean your idle control valve (ICV). It's easy to remove the ICV 12 minutes job and clean it with the Throttle Body & Air Intake Cleaner!!!

I can feel the difference in the acceleration and there's no slight hesitation or engine rough idle and after clearing the check engine light it will not come back on!!!
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Old 11-12-2009, 08:40 PM
teejaylentz teejaylentz is offline
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Location: Redmond, WA
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Posts: 313
Mein Auto: 2002 745i
Hmmm - I'm not sure this exists on the E65... Was looking around on realoem.com and couldn't find it for our car - I did find it for the E90 though. If it is this simple, I will definitely be looking into it!

Mine also idles rough at startup (when cold) and takes 15-20 seconds before it settles down. My impression was that the valvetronic takes some time to initialize. During initial startup my understanding is that the air intake is controlled by the throttle body (which is normally not used as air is controlled at the engine intake valves). However, this theory doesn't completely explain (IMO) why the idle isn't rough when I start the car again if it is still warm. When either warm or cold, wouldn't the valvetronic still need time to initialize...?
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Old 11-13-2009, 05:21 AM
Keif Keif is offline
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Location: Houston, TX
Join Date: Mar 2008
Posts: 2,213
Mein Auto: 2007 Alpina B7
Based on your description, the equivalent parts on the E65/E66 would probably be the throttle body (#1 here) or the part that shortens/lengthens the intake runners (#2 here). However, on the E65/E66's N62 engine there is a little more to it than just those parts -- for example, the differential pressure sensor (#4 here), not to mention the implications of using a valvetronic system at or near idle (very little vacuum, for example).

My point is that the 8-cyl N62 and 12-cyl N73 engines are very different beasts from the 6-cyl ones, and while that part is a good start, I think it's an oversimplification of the system as a whole.
Black 2007 Alpina B7
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Last edited by Keif; 11-13-2009 at 05:28 AM.
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Old 11-13-2009, 04:58 PM
desant89 desant89 is offline
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Location: Southern, NJ
Join Date: Sep 2009
Posts: 43
Mein Auto: 2007 750li
My Dealer told me the rough idle, and sounding like crap for the first 20 to 30 seconds is a 7 thing, and they all do it.
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Old 11-13-2009, 10:17 PM
teejaylentz teejaylentz is offline
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Location: Redmond, WA
Join Date: Sep 2008
Posts: 313
Mein Auto: 2002 745i
Originally Posted by desant89 View Post
My Dealer told me the rough idle, and sounding like crap for the first 20 to 30 seconds is a 7 thing, and they all do it.
That has been my assumption and not particularly worried about it... BUT - if there's an easy known fix I'd love to know...
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Old 02-19-2015, 09:54 AM
lcarreth lcarreth is offline
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Location: oklahoma
Join Date: Apr 2013
Posts: 1
Mein Auto: 2008 750li
my 2008 750li started the rough thing about a week ago. When started it this morning and left the check engine light is now on. Do you think I have to replace the Intake Manifold Adjusting Unit
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