Engine Question

M3maniac20 · 05-08-2011, 02:09 PM

Hello All,

I have a 2011.5 E92 and have noticed something a little different about the engine and just wondering if it is normal.

When I start it (not cold start, or first start of the day-usually after it has warmed up but then sat for a while) the rpm's kinda jump around from about 500-700. It also has that sound too of the engine revving up and down.
Just wondering if this is normal. Temp is about 150-170 when it happens.

Thanks

M3maniac20 · 05-08-2011, 06:44 PM

Thank you for all the rapid responses!

Prince_of_Persia · 05-08-2011, 07:08 PM

Quote:

Originally Posted by M3maniac20

Thank you for all the rapid responses!

Hahaha!
I never had experienced such a thing. When I start my car (cold start) it is around 1200 RPM and after 30 seconds it goes down to around 700 ish. When is is warm, it starts right away from 700 - 900 RPM range.

TailHappyM3 · 05-08-2011, 07:15 PM

Quote:

Originally Posted by M3maniac20

Thank you for all the rapid responses!

LOL

I think it's fine.

mdosu · 05-08-2011, 08:21 PM

does it go down or up?

J08M3 · 05-08-2011, 08:32 PM

Mine does the same. Seems different than my 08 was.

Race_Doc11 · 05-08-2011, 08:42 PM

Mine is 08 and it does the same; first it jumps to 1200 which in normal then it goes down to 600 or 700 but suddenly it drops as if it will stall then it goes up again. It doesn't matter if it is cold or not as long as the car is turned off for an hour or more...I don't think this is normal but the dealer thinks it is...Any idea what is wrong?

mdosu · 05-08-2011, 08:46 PM

^ soudns like idle air valve...hmmm

wwjd15 · 05-08-2011, 08:49 PM

Just air pump warms up the cats. If you think that's an issue for you, you can have your dealer checked the air pump sensor.

GreasyGinzo · 05-09-2011, 05:32 AM

My 08 tends to idles rough sometimes but I don't think it isn't normal

BPMSport · 05-10-2011, 01:03 AM

Not normal, it shouldn't jump. It should progressly lower as it warms.

Sounds like a faulty idle control valve or something else going on..

Race_Doc11 · 05-10-2011, 08:11 AM

This has started since I got a faulty Idle valve 2 years ago it was fix back then by the deaer....

Quote:

Originally Posted by Mike@Powerchip

Not normal, it shouldn't jump. It should progressly lower as it warms.

Sounds like a faulty idle control valve or something else going on..

Templar · 05-10-2011, 09:06 AM

I guess it depends on your idea of jump. If it divebombs as if it's going to stall, then maybe there is an issue. If it gradually goes down after a bit, then it is probably normal.

Mine seems to just gradual move down from around 1200-ish on a cold start.

yusammyyu · 05-11-2011, 01:05 AM

same as my.

05-08-2011, 02:09 PM	#1
M3maniac20 Captain 87 Rep 725 Posts Drives: 2013 BMW 335is Coupe Join Date: Aug 2010 Location: Austin, Texas iTrader: (0)	Engine Question Hello All, I have a 2011.5 E92 and have noticed something a little different about the engine and just wondering if it is normal. When I start it (not cold start, or first start of the day-usually after it has warmed up but then sat for a while) the rpm's kinda jump around from about 500-700. It also has that sound too of the engine revving up and down. Just wondering if this is normal. Temp is about 150-170 when it happens. Thanks __________________ 2016 340i M-Sport 6-MT(on order) 2013 335is (still have) 2011.5 M3 ZCP (traded in)
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05-08-2011, 06:44 PM	#2
M3maniac20 Captain 87 Rep 725 Posts Drives: 2013 BMW 335is Coupe Join Date: Aug 2010 Location: Austin, Texas iTrader: (0)	Thank you for all the rapid responses! __________________ 2016 340i M-Sport 6-MT(on order) 2013 335is (still have) 2011.5 M3 ZCP (traded in)
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05-08-2011, 08:21 PM	#5
mdosu Banned 314 Rep 8,496 Posts Drives: Double Vanos'd Civic-M3 Join Date: Oct 2009 Location: San Francisco iTrader: (6)	does it go down or up?
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05-08-2011, 08:32 PM	#6
J08M3 Major General 285 Rep 6,007 Posts Drives: 2011 M3 COUPE Join Date: May 2008 Location: NEW YORK iTrader: (8)	Mine does the same. Seems different than my 08 was. __________________
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05-08-2011, 08:42 PM	#7
Race_Doc11 Lieutenant Colonel 460 Rep 1,633 Posts Drives: 2023 G82 M4 Join Date: Jan 2008 Location: USA iTrader: (1) Garage List 2023 BMW G82 M4 [0.00] 2018 F80 M3 [10.00] 2013 Audi RS5 (Sold) [10.00] 2008 E93 M3 (Sold) [10.00]	Mine almost stalls Mine is 08 and it does the same; first it jumps to 1200 which in normal then it goes down to 600 or 700 but suddenly it drops as if it will stall then it goes up again. It doesn't matter if it is cold or not as long as the car is turned off for an hour or more...I don't think this is normal but the dealer thinks it is...Any idea what is wrong?
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05-08-2011, 08:46 PM	#8
mdosu Banned 314 Rep 8,496 Posts Drives: Double Vanos'd Civic-M3 Join Date: Oct 2009 Location: San Francisco iTrader: (6)	^ soudns like idle air valve...hmmm
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05-08-2011, 08:49 PM	#9
wwjd15 Banned 89 Rep 1,315 Posts Drives: 11 E92 M3 MR Join Date: May 2009 Location: Orange County iTrader: (6)	Just air pump warms up the cats. If you think that's an issue for you, you can have your dealer checked the air pump sensor.
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05-09-2011, 05:32 AM	#10
GreasyGinzo Captain 41 Rep 635 Posts Drives: '08 E92 AW 6MT M3(Totaled) Join Date: Dec 2010 Location: North Jersey iTrader: (1)	My 08 tends to idles rough sometimes but I don't think it isn't normal __________________
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05-10-2011, 01:03 AM	#11
BPMSport BimmerPost Supporting Vendor 3387 Rep 7,541 Posts Drives: Harrop M3 / F10 M5 / F82 M4 Join Date: Apr 2008 Location: SoCal iTrader: (9) Garage List 2000 BMW M5 [0.00] 1990 BMW 735i Turbo [0.00] 2008 BMW M3 [7.50] 2015 BMW M3 [0.00] 2015 BMW M5 [0.00]	Not normal, it shouldn't jump. It should progressly lower as it warms. Sounds like a faulty idle control valve or something else going on.. __________________ -----\| Like us on Facebook \| Instagram \|\| Tuning Information \| Remote Coding \|----- ----Visit us at www.BPMSport.com - Emotion. Driven. \| Toll Free: (888) 557-5133----
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05-10-2011, 09:06 AM	#13
Templar Lieutenant Colonel 268 Rep 1,883 Posts Drives: 2011 E92 M3 Join Date: Feb 2009 Location: One of the coasts... iTrader: (1) Garage List 2011 BMW M3 [10.00]	I guess it depends on your idea of jump. If it divebombs as if it's going to stall, then maybe there is an issue. If it gradually goes down after a bit, then it is probably normal. Mine seems to just gradual move down from around 1200-ish on a cold start. __________________ '11 BMW E92 ///M3 - ZCP and DCT '15 Ford F-250 - Lariat, 6.7 Powerstroke Turbo-diesel
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05-11-2011, 01:05 AM	#14
yusammyyu Private First Class 24 Rep 132 Posts Drives: 2011 Bmw M3 coupe Join Date: Dec 2010 Location: Los Angeles,ca iTrader: (0)	same as my.
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