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  #1  
Old 05-22-2016, 07:35 AM
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Idle speed and brief "dip"

What's the normal idle speed for the 3.0si? I feel like mine is too high - probably at 850 RPM. Also when in drive and foot on the brake the idle drops very briefly several times. It's just a quick drop and goes back to normal - sometimes this doesn't happen at all and other times it does it 2 or 3 times. Any ideas?
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  #2  
Old 05-22-2016, 12:43 PM
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Mine shows about 600rpms with AC OFF and 800-850 when the air conditioning is ON. You always get a boost in rpms when the AC is ON. As for the idle drop, did you try to pull any codes? Btw, im in Winston Salem, if you ever need to chance some settings with iCarly
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Old 05-22-2016, 02:08 PM
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Quote:
Originally Posted by youry View Post
Mine shows about 600rpms with AC OFF and 800-850 when the air conditioning is ON. You always get a boost in rpms when the AC is ON. As for the idle drop, did you try to pull any codes? Btw, im in Winston Salem, if you ever need to chance some settings with iCarly
I may need to run by my indy shop and get the codes checked. Thanks for the offer on the iCarly - I may take you up on that!!
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Old 05-22-2016, 02:27 PM
ard ard is offline
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^ AC cycles on and off all the time, either in the summer for cooling or winter for defrosting/dehumidifying...
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Old 05-23-2016, 07:44 AM
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Same Problem on mine before I had the issue with the coil packs and vanos cylinder exhaust side.
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2010 X5 3.0 X-drive Titanium Silver/Black
2018 Ford F-150 Platinum Crew
2010 528xi (His)
2017 M2 Manual (His)

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2007 530xi 6spd CPO Sport (Best Damn Car EVER)
2011 335xi M-sport Coupe 6spd (Sex on Wheels)
2010 550GT "CPO" (Junk)
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Old 05-23-2016, 09:28 AM
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Originally Posted by ard View Post
^ AC cycles on and off all the time, either in the summer for cooling or winter for defrosting/dehumidifying...
I don't think that's it...
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Old 05-23-2016, 09:29 AM
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Quote:
Originally Posted by bmrboi2 View Post
Same Problem on mine before I had the issue with the coil packs and vanos cylinder exhaust side.
Was it caused by the coil packs and/or the vanos cylinder???
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Old 05-23-2016, 03:17 PM
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I replaced the coil packs and the vanos later. The issue was still there after the coil packs were replaced. So It leads me to believe the vanos was the culprit as its never happened again. I think I have a vacuum leak somewhere. (Idle fluctuations after a warm startup/running errands)
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2010 X5 3.0 X-drive Titanium Silver/Black
2018 Ford F-150 Platinum Crew
2010 528xi (His)
2017 M2 Manual (His)

Former Headaches:
2008 X5 RIP
2015 M235
2013 135is
2009 535xi Wagon (JUNK)
2007 530xi 6spd CPO Sport (Best Damn Car EVER)
2011 335xi M-sport Coupe 6spd (Sex on Wheels)
2010 550GT "CPO" (Junk)
2012 X5 35d "CPO" (More Junk)
2004 330i ZHP Sedan
2002 325xi Wagon
2000 323i Sedan
1998 M3 Sedan
1992 325i Sedan
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Old 06-02-2016, 08:37 PM
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^ Oddly enough my check engine light came on this morning. Ran by my Indy Mechanic and it appears to be an O2 Sensor...I wonder if this has anything to do with the idle issue.
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  #10  
Old 07-04-2016, 05:48 AM
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This issue seem to be getting worse - took a very long road trip to drop one of my kids off at summer camp on Saturday/Sunday. While driving at highway speeds everything is just fine however when coming to a stop and idling I'm getting these idle fluctuations more frequently and closer together. Yesterday morning we stopped at a store after driving for about 2.5 hours and my wife went inside for about 10 minutes. I stayed in the car and let it idle. The outside temperature was about 74 degrees and there were no idle dips/fluctuations. Yesterday afternoon when the temperature was in the 80s and up it was doing this quite a lot. I've had the codes read several times and it's not throwing anything.
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