Idle speed problem

jun_e92 · 03-13-2020, 01:55 PM

The 2011 BMW M3 has just passed 80K, and sometimes the cold start is unstable for 15-20 seconds, and it is normal after about 10 seconds. This symptom has been for more than a year. Idling control valve and fuel tank vent valve were changed three months ago. These symptoms are back these days! what is the problem?

jvictormp · 03-13-2020, 06:55 PM

Idling control valve and fuel tank vent valve were changed because of the problem? So it's been three months without the problem, and now it showed up again?

jun_e92 · 03-14-2020, 12:16 AM

Yes, is this related to warming?

jvictormp · 03-14-2020, 07:16 PM

Did you look for fault codes?

Wally1552 · 03-15-2020, 06:51 AM

Did you place the ICV hose? I heard those could leak too?

jun_e92 · 03-15-2020, 12:52 PM

No fault code.Look at the ICV hose again。

maicol76 · 03-17-2020, 03:58 AM

consider replacing fuel tank cap with new one.
In my case, after replacing it, gone.

jun_e92 · 04-10-2020, 04:11 PM

Thank you very much for the information provided. Replace the fuel tank cap with a new one. Under the condition of COVID-19, I only started the car a few times, normal, and then observe.

jvictormp · 04-11-2020, 08:34 AM

Thanks for returning with information.

I'm facing problems of fuel tank level variations.

When car is stopped, level is fine. When accelerating or braking or turning, the level slowly goes up or down, making effects in the projected autonomy at the on board computer.

The on board computer doesn't show anything about consumption, avg speed, etc. Only shows autonomy.

Don't have a clue about it. Maybe I should open a thread.

03-13-2020, 01:55 PM	#1
jun_e92 Second Lieutenant 141 Rep 258 Posts Drives: 2011 E92 M3 ZCP Join Date: Dec 2018 Location: Bay Area， CA iTrader: (3)	Idle speed problem The 2011 BMW M3 has just passed 80K, and sometimes the cold start is unstable for 15-20 seconds, and it is normal after about 10 seconds. This symptom has been for more than a year. Idling control valve and fuel tank vent valve were changed three months ago. These symptoms are back these days! what is the problem?
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03-13-2020, 06:55 PM	#2
jvictormp Captain 881 Rep 787 Posts Drives: 2008 M3 E92 6MT Join Date: Dec 2018 Location: Brazil iTrader: (0)	Idling control valve and fuel tank vent valve were changed because of the problem? So it's been three months without the problem, and now it showed up again?
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03-14-2020, 12:16 AM	#3
jun_e92 Second Lieutenant 141 Rep 258 Posts Drives: 2011 E92 M3 ZCP Join Date: Dec 2018 Location: Bay Area， CA iTrader: (3)	Idle speed problem Yes, is this related to warming?
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03-14-2020, 07:16 PM	#4
jvictormp Captain 881 Rep 787 Posts Drives: 2008 M3 E92 6MT Join Date: Dec 2018 Location: Brazil iTrader: (0)	Did you look for fault codes?
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03-15-2020, 06:51 AM	#5
Wally1552 First Lieutenant 122 Rep 334 Posts Drives: 135i Join Date: Jun 2009 Location: HI iTrader: (0)	Did you place the ICV hose? I heard those could leak too?
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03-15-2020, 12:52 PM	#6
jun_e92 Second Lieutenant 141 Rep 258 Posts Drives: 2011 E92 M3 ZCP Join Date: Dec 2018 Location: Bay Area， CA iTrader: (3)	No fault code.Look at the ICV hose again。
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03-17-2020, 03:58 AM	#7
maicol76 First Lieutenant 194 Rep 305 Posts Drives: E92 M3 Join Date: Oct 2011 Location: CA, Santa fe iTrader: (0)	consider replacing fuel tank cap with new one. In my case, after replacing it, gone. __________________ 2011 LCI W/DCT / K&N drop in filter / CSF radiator / do88 oil cooler / do88 DCT cooler / Akra Evo / Moton CS 2 way coilover / Wiechers strut bar(F) / ARC strut bar(R) / Alcon Superkit BBK / Tarox rotor / Geoff steel EHPS / Sard carbon-Kevlar GT wing / GT4 carnard / Aim Evo4+G-dash+GT Steering+S/C GP HD / Bride Zeta3 / etc.
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04-10-2020, 04:11 PM	#8
jun_e92 Second Lieutenant 141 Rep 258 Posts Drives: 2011 E92 M3 ZCP Join Date: Dec 2018 Location: Bay Area， CA iTrader: (3)	Idle speed problem Thank you very much for the information provided. Replace the fuel tank cap with a new one. Under the condition of COVID-19, I only started the car a few times, normal, and then observe.
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04-11-2020, 08:34 AM	#9
jvictormp Captain 881 Rep 787 Posts Drives: 2008 M3 E92 6MT Join Date: Dec 2018 Location: Brazil iTrader: (0)	Thanks for returning with information. I'm facing problems of fuel tank level variations. When car is stopped, level is fine. When accelerating or braking or turning, the level slowly goes up or down, making effects in the projected autonomy at the on board computer. The on board computer doesn't show anything about consumption, avg speed, etc. Only shows autonomy. Don't have a clue about it. Maybe I should open a thread.
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