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2010 2011 BMW 5 Series Forum F10 BMW 5-Series (F10) Forums General 5-Series Sedan and Wagon (F10 / F11) Forum does this happen to your f10?
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      06-27-2011, 12:53 PM   #1
Evil335i
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does this happen to your f10?

When starting my car in the morning everything runs fine. When i goto lunch around 12-1 car is parked outside in the sun...when i start my car the rpm starts going up & down for like 5 seconds really fast. does anyone know the problem for this?
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      06-27-2011, 01:22 PM   #2
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Yes, my car does this. My dealer says it's normal due to "hot air in the intake tract, between the MAF and the throttle".

I call Bullfeathers on this one. I ran a Volvo V70R with a tune that was running much more boost than this car, and it never did any of that crap, even stock.

Bringing it back in for other issues, will have them look at this again.
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      06-27-2011, 01:57 PM   #3
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Quote:
Originally Posted by Evil335i View Post
When starting my car in the morning everything runs fine. When i goto lunch around 12-1 car is parked outside in the sun...when i start my car the rpm starts going up & down for like 5 seconds really fast. does anyone know the problem for this?
My RPM does not go up but more often than not, my cooling fan goes to a very high speed for a few seconds and sounds really loud. After 5 to 10 seconds it then goes back down to where I can't really hear it.
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      06-27-2011, 02:56 PM   #4
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My car does this too and dealer said "could not duplicate" ..... bunch of pansies...
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      06-27-2011, 07:32 PM   #5
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Quote:
Originally Posted by Needsdecaf View Post
Yes, my car does this. My dealer says it's normal due to "hot air in the intake tract, between the MAF and the throttle".

I call Bullfeathers on this one. I ran a Volvo V70R with a tune that was running much more boost than this car, and it never did any of that crap, even stock.

Bringing it back in for other issues, will have them look at this again.
Let me know how it goes when you bring it back.

Quote:
Originally Posted by ghueser View Post
My RPM does not go up but more often than not, my cooling fan goes to a very high speed for a few seconds and sounds really loud. After 5 to 10 seconds it then goes back down to where I can't really hear it.
Actually you explained it better then i did...hahaha but, yeah i do hear the fan going really high speeds for 5-10 seconds but my rpm goes up & down while its doing that. Then when it stops the Rpm is back to normal.
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      06-27-2011, 07:50 PM   #6
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Yes, mine has done this once out of only about 5 start-ups so far. Glad to hear it isn't just me!
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      06-27-2011, 09:18 PM   #7
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Yes, I have this same rpm issue but not with every start. It is very annoying and I had dealer check it out last week. They said they noticed it however car is operating as designed. I think that is BS! I never noticed this problem until after they performed softward update for steering issue.
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      06-27-2011, 10:20 PM   #8
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This is most likely completely normal. You are still dealing with a mechanical device. The engine management system is permitted to tweak the engine during idle as a means to stabilize the engine or otherwise manage excessive emissions.

Now, if you throw it into gear during this time and the engine stutters or acts strange then you may have a valid complaint.

But, idle management routines that fluctuate engine rpm are typically under control of the computer. You will see similar throttle activity during idle when the engine is cold and when the engine executes some break in logic.

Again, next time this occurs throw it immediately into gear and you will see that vehicle drive performance remains virtually unaffected.

[QUOTE=Evil335i;9905373]When starting my car in the morning everything runs fine. When i goto lunch around 12-1 car is parked outside in the sun...when i start my car the rpm starts going up
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      06-28-2011, 01:49 AM   #9
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Quote:
Originally Posted by ghueser View Post
My RPM does not go up but more often than not, my cooling fan goes to a very high speed for a few seconds and sounds really loud. After 5 to 10 seconds it then goes back down to where I can't really hear it.
Same as mine, when its hot I notice fan starts up on initial turn over at high rpm for a few minutes and then goes to normal. I have also had it stay on high rpm AFTER I shut the car off in the garage. My home is just a short distance from the entrance/exit ramps to unrestricted part of the autobahn so more often then not my car was running well over 100mph shortly before pulling into the garage.
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      06-28-2011, 08:54 AM   #10
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No. I live in England. We don't have sun or hot weather here.
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      06-28-2011, 09:17 AM   #11
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Quote:
Originally Posted by AWF10 View Post
Yes, I have this same rpm issue but not with every start. It is very annoying and I had dealer check it out last week. They said they noticed it however car is operating as designed. I think that is BS! I never noticed this problem until after they performed softward update for steering issue.
I have this issue as well. It's happened about 5 times since I got the car 7 weeks ago. Haven't asked the dealer to look at it yet, since it's already been in the shop more days than I've had it to drive (2.5 wks after someone backed into it while parked and 2 wks while they try to figure out why my iPhone won't connect w/ BMW Apps through the snap-in). I also have a defective, wavy windshield that makes the head's up display blurry in spots. Trying to pick my battles, not happy w/ so many issues so far.
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      06-28-2011, 02:16 PM   #12
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This actaully happen to me after i passed 5k miles. But during that time it wasnt hot here in so cal. Just recently got hot here.
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      09-13-2011, 12:20 PM   #13
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Is there any solution to the rough idle after a warm start? my 535i x is doing it for about 5 to 8 seconds after a warm start (engine already warm), it does not happen on a cold engine start....
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      09-13-2011, 01:39 PM   #14
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Originally Posted by valcor535 View Post
Is there any solution to the rough idle after a warm start? my 535i x is doing it for about 5 to 8 seconds after a warm start (engine already warm), it does not happen on a cold engine start....
Yes, mine does this too. My dealer said it was normal. I say it's a bull.
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      09-13-2011, 02:28 PM   #15
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when they dont know what it is. it usually becomes "This is normal"
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      09-14-2011, 11:27 AM   #16
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I noticed it on my test drive before buying the car and the sales manager said it was normal. Still does it today. My 335i did it as well.
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      09-15-2011, 04:56 PM   #17
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Dealer duplicated problem with idle rev-up

said they checked with BMW and were told that the bug was in the latest software installed to correct the pull to the right problem. "BMW is working on a fix"
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      09-20-2011, 11:05 AM   #18
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My new 5 does the same thing every couple of days. I haven't addressed it with the dealer but it doesn't sound like there's any use!
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      02-24-2012, 09:25 AM   #19
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Any updates on this issue?
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      02-25-2012, 02:37 PM   #20
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My 2011 535i did this idle thing and the dealer could not fix it after many attempts. I now have a new 2012 535i courtesy of BMWNA and my dealer.

I cannot say enough about the great support that BMW of Palm Beach gave me.

Problem solved.
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      02-26-2012, 01:55 PM   #21
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Quote:
Originally Posted by Shake n Bake
No. I live in England. We don't have sun or hot weather here.
+1

I live in Sweden, no problems with the sun here either... :lol
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      02-26-2012, 02:17 PM   #22
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Quote:
Originally Posted by NAL View Post
My 2011 535i did this idle thing and the dealer could not fix it after many attempts. I now have a new 2012 535i courtesy of BMWNA and my dealer.

I cannot say enough about the great support that BMW of Palm Beach gave me.

Problem solved.
Wow. Wish I could get the same for my problem. I can replicate it at will..simply let the car come up to temperature, shut it off and then start at least an hour later. Bingo revs flare like no one's business.
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