RPM fluctuates at cold start

David_Vasha · 09-06-2019, 07:38 AM

Hey everyone, I seem to have a bit of a worry when it comes to my 2011 535i Xdrive. Every time I turn it on for a cold start, it reveals from 1000 rpm to 1500 rpm for about 10 seconds or so. I've looked around and didn't find much on this topic. Was just wondering if there was anything serious that I need to fix. I've checked everything in the engine and everything seems to be running fine and I scanned the ECU and found no codes other than an 11a210 and 11a204 code which was explaining that the LPFP had some pressure issues which isn't a big deal as it's only a sensor that needs replacing. I feel like the two situations aren't correlated though and I think that this cold start issue is software related if anything. Anyways what do y'all think?

David_Vasha · 09-07-2019, 12:45 AM

Does anyone have any suggestions?

ezaircon4jc · 09-07-2019, 12:27 PM

Flucuates or just starts high then settles-down after a bit?

David_Vasha · 09-07-2019, 02:45 PM

Quote:

Originally Posted by ezaircon4jc

Flucuates or just starts high then settles-down after a bit?

When I start it it's at the normal rpm then if fluctuates from about 800 rpm to 1500rpm then settles down after 10 seconds or so

ziekxq · 09-07-2019, 06:07 PM

Quote:

Originally Posted by David_Vasha

When I start it it's at the normal rpm then if fluctuates from about 800 rpm to 1500rpm then settles down after 10 seconds or so

That happens to me as well and I still haven't figured it out.

bake · 09-07-2019, 10:16 PM

Look into the valvetronic motor. My 2011 was experiencing similar behavior and that was the culprit.

David_Vasha · 09-08-2019, 10:00 AM

Quote:

Originally Posted by bake

Look into the valvetronic motor. My 2011 was experiencing similar behavior and that was the culprit.

I scanned my car and it came up with no codes whatsoever regarding this issue. I'm led to believe that this is a software fluke on bmw which I need them to recalibrate or whatever

ezaircon4jc · 09-08-2019, 02:53 PM

Checked mine this morning...

1200ish until I out the trans in "N", then down to about 850. Once I drive (gently) for a minute or so the RPM drops to normal. I've been told high initial RPM is to get the engine up to operating temp sooner for emissions. Ambient temp this morning was about 63ºF (dewpoint mid 50's ish).

bake · 09-08-2019, 09:52 PM

Quote:

Originally Posted by David_Vasha

Quote:

Originally Posted by bake

Look into the valvetronic motor. My 2011 was experiencing similar behavior and that was the culprit.

I scanned my car and it came up with no codes whatsoever regarding this issue. I'm led to believe that this is a software fluke on bmw which I need them to recalibrate or whatever

I scanned my car and it didn't show any codes either, but when the dealer checked for codes there was a valvetronic motor fault code saved in the DME. Not saying your issue is the same, but this was my experience.

gpabalinas81 · 09-08-2019, 10:56 PM

I believe this is normal. When I start the car in the morning, it goes up to about 1200- 1500 RPM, then about 10-15 seconds drops down to normal about 800-900 rpm> If i'm not mistaken its to help with oil circulation on cold starts.

AZ-MCRacer · 09-09-2019, 04:15 PM

Quote:

Originally Posted by gpabalinas81

I believe this is normal. When I start the car in the morning, it goes up to about 1200- 1500 RPM, then about 10-15 seconds drops down to normal about 800-900 rpm> If i'm not mistaken its to help with oil circulation on cold starts.

This is normal behavior for cat warm up.

ziekxq · 09-09-2019, 05:43 PM

I have my cold start turned off. It does for a quick second for me and goes down and than never does it again until the car is cold again and I start the engine.

David_Vasha · 09-09-2019, 10:08 PM

Thank you everyone for your replies. I may have been overreacting a bit. I just got the car and it's got me noticing every tiny detail. If it gets worse or throws a code I'll know where to go, you guys. Thanks again.

lsturbointeg · 09-10-2019, 04:03 PM

Quote:

Originally Posted by David_Vasha

Thank you everyone for your replies. I may have been overreacting a bit. I just got the car and it's got me noticing every tiny detail. If it gets worse or throws a code I'll know where to go, you guys. Thanks again.

You're good. Mine does that but mine's pretty loud since I have Meisterschaft's so every now and than the wife will open the garage door and ask is that normal cause it vibrates the whole house

gpabalinas81 · 09-10-2019, 06:57 PM

Quote:

Originally Posted by lsturbointeg

You're good. Mine does that but mine's pretty loud since I have Meisterschaft's so every now and than the wife will open the garage door and ask is that normal cause it vibrates the whole house

Lol!!! My Remus on cold start also vibrates the kitchen windows and sliding doors lol, but it gets quiet after it warms up! lol

ziekxq · 09-10-2019, 09:00 PM

Quote:

Originally Posted by gpabalinas81

Lol!!! My Remus on cold start also vibrates the kitchen windows and sliding doors lol, but it gets quiet after it warms up! lol

When I had cold start on my car and I took it to the dealership and they started the car in service area lol lol the other customers got scared because all the glass started vibrating.

gpabalinas81 · 09-13-2019, 06:44 PM

Quote:

Originally Posted by ziekxq

When I had cold start on my car and I took it to the dealership and they started the car in service area lol lol the other customers got scared because all the glass started vibrating.

lol!! gotta love the cold starts!! hahaha

09-06-2019, 07:38 AM	#1
David_Vasha Private First Class 35 Rep 199 Posts Drives: 2011 535i XDrive Join Date: Apr 2019 Location: Charlotte, North Carolina iTrader: (0)	RPM fluctuates at cold start Hey everyone, I seem to have a bit of a worry when it comes to my 2011 535i Xdrive. Every time I turn it on for a cold start, it reveals from 1000 rpm to 1500 rpm for about 10 seconds or so. I've looked around and didn't find much on this topic. Was just wondering if there was anything serious that I need to fix. I've checked everything in the engine and everything seems to be running fine and I scanned the ECU and found no codes other than an 11a210 and 11a204 code which was explaining that the LPFP had some pressure issues which isn't a big deal as it's only a sensor that needs replacing. I feel like the two situations aren't correlated though and I think that this cold start issue is software related if anything. Anyways what do y'all think?
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09-07-2019, 12:45 AM	#2
David_Vasha Private First Class 35 Rep 199 Posts Drives: 2011 535i XDrive Join Date: Apr 2019 Location: Charlotte, North Carolina iTrader: (0)	Does anyone have any suggestions?
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09-07-2019, 12:27 PM	#3
ezaircon4jc Major General 4479 Rep 5,358 Posts Drives: 2019 540i M Sport Join Date: Jan 2015 Location: San Diego iTrader: (0)	Flucuates or just starts high then settles-down after a bit?
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09-07-2019, 10:16 PM	#6
bake Colonel 602 Rep 2,196 Posts Drives: 2011 F10, 2013 E93 Join Date: Apr 2010 Location: New York iTrader: (9)	Look into the valvetronic motor. My 2011 was experiencing similar behavior and that was the culprit. __________________ *Bake* 2011 Alpine White on Black 535i M-Sport 2013 Space Gray on Fox Red M3 Vert
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09-08-2019, 02:53 PM	#8
ezaircon4jc Major General 4479 Rep 5,358 Posts Drives: 2019 540i M Sport Join Date: Jan 2015 Location: San Diego iTrader: (0)	Checked mine this morning... 1200ish until I out the trans in "N", then down to about 850. Once I drive (gently) for a minute or so the RPM drops to normal. I've been told high initial RPM is to get the engine up to operating temp sooner for emissions. Ambient temp this morning was about 63ºF (dewpoint mid 50's ish).
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09-08-2019, 10:56 PM	#10
gpabalinas81 Private 21 Rep 60 Posts Drives: 2014 535i M Sport Join Date: Apr 2019 Location: Vallejo, CA iTrader: (0)	I believe this is normal. When I start the car in the morning, it goes up to about 1200- 1500 RPM, then about 10-15 seconds drops down to normal about 800-900 rpm> If i'm not mistaken its to help with oil circulation on cold starts. __________________ 2014 535i M Sport Mods: BMS Intake, FTP Charge Pipe, FTP Boost Pipe, G-Plus FMIC, JB4, Remus Sport Exhaust with 84mm Black Carbon Tips
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09-09-2019, 05:43 PM	#12
ziekxq Major 320 Rep 1,299 Posts Drives: 2011 535i xDrive Join Date: Feb 2016 Location: United States iTrader: (0)	I have my cold start turned off. It does for a quick second for me and goes down and than never does it again until the car is cold again and I start the engine.
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09-09-2019, 10:08 PM	#13
David_Vasha Private First Class 35 Rep 199 Posts Drives: 2011 535i XDrive Join Date: Apr 2019 Location: Charlotte, North Carolina iTrader: (0)	Thank you everyone for your replies. I may have been overreacting a bit. I just got the car and it's got me noticing every tiny detail. If it gets worse or throws a code I'll know where to go, you guys. Thanks again.
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