My e92 m3 is idling very oddly..

AMG_LAWL · 11-13-2015, 12:11 PM

Quote:

Originally Posted by kscarrol

Yes, that was what mine would do. Dropped to zero and put the car into neutral. Actually stalled a couple of times... Here is an old video of what my idle would do before replacing the fuel tank breather valve. The car did not stall or drop the DCT into neutral but you can see the wild swings in rpm's...

Thanks for the vid bro. Im having that problem but not as severe at yours. My shop has narrowed the problem down to the fuel breather valve! They pressure checked all the coils and those are fine, plugs are fine, and idle control valve is fine, so were hoping its the FBV....

AMG_LAWL · 11-21-2015, 11:38 AM

So I haven't gotten to a dealer yet as my work schedule is pretty crazy right now. But last night I was stopped at a red light and my car was idling at about 400.... then the engine just stopped.. No service lights or limp mode lights, nothing no service lights at all. I just started the car like normal and went on with my night.... What could have caused this if my dash isn't lighting up like a christmas tree......

FISH22 · 11-21-2015, 11:43 AM

Quote:

Originally Posted by AMG_LAWL

So I haven't gotten to a dealer yet as my work schedule is pretty crazy right now. But last night I was stopped at a red light and my car was idling at about 400.... then the engine just stopped.. No service lights or limp mode lights, nothing no service lights at all. I just started the car like normal and went on with my night.... What could have caused this if my dash isn't lighting up like a christmas tree......

This has happened to me a couple times shortly after filling up the tank. Usually a quick spike in idle, then dead. I just restart and go on about my life.

stevelp99 · 11-21-2015, 12:14 PM

Mine started out like that a few weeks ago, at random if I let the car sit at idle too long, then one day after a fill up it started to idle rough, I though the 2 were connected but it turned out to be a failing precat O2 sensor. I ended up with misfires, limp mode, increased emissions. The odd idling wasn't throwing any codes, and it wasn't until it got bad enough to actually find any error codes. Actuators and idle control components were inspected but couldn't find anything wrong until O2 sensor codes were thrown which led us to the O2 sensor. After putting in a new sensor the car has been flawless.

redpriest · 11-21-2015, 12:38 PM

I have this problem as well. It's just annoying more than anything else - had the car stall a couple times, always after filling the tank, and only then. I should get around to getting it fixed.

AMG_LAWL · 11-21-2015, 01:15 PM

Oh man! Really apprecite this info, im gonna have the shop look at the O2 Sensor. Just a random thought: I havent cleaned my MS filter in about 20k miles.. do you think this is the issue? Or this issue causing the AFS to freak out?

Quote:

Originally Posted by stevelp99

Mine started out like that a few weeks ago, at random if I let the car sit at idle too long, then one day after a fill up it started to idle rough, I though the 2 were connected but it turned out to be a failing precat O2 sensor. I ended up with misfires, limp mode, increased emissions. The odd idling wasn't throwing any codes, and it wasn't until it got bad enough to actually find any error codes. Actuators and idle control components were inspected but couldn't find anything wrong until O2 sensor codes were thrown which led us to the O2 sensor. After putting in a new sensor the car has been flawless.

AMG_LAWL · 11-21-2015, 01:16 PM

You would think they fix it by the time the last 2013 model rolled out....

Quote:

Originally Posted by redpriest

I have this problem as well. It's just annoying more than anything else - had the car stall a couple times, always after filling the tank, and only then. I should get around to getting it fixed.

stevelp99 · 11-21-2015, 03:07 PM

Quote:

Originally Posted by AMG_LAWL

Oh man! Really apprecite this info, im gonna have the shop look at the O2 Sensor. Just a random thought: I havent cleaned my MS filter in about 20k miles.. do you think this is the issue? Or this issue causing the AFS to freak out?

Unless your air filter is exceptionally dirty I doubt its the issue. I changed mine out when I first started seeing my idle issues, it was a little dirty but It didn't solve the issue. My issue came and went for 3 weeks.

Whats AFS?

AMG_LAWL · 11-21-2015, 05:35 PM

Quote:

Originally Posted by stevelp99

Unless your air filter is exceptionally dirty I doubt its the issue. I changed mine out when I first started seeing my idle issues, it was a little dirty but It didn't solve the issue. My issue came and went for 3 weeks.

Whats AFS?

I think Air Flow Sensor lol. Either way Im going to recommend the shop look at the O2 sensor

stevelp99 · 11-21-2015, 06:40 PM

Its quite possible the Mass Air Flow Sensor (MAF) is dirty, especially if you run an oiled aftermarket filter, as they can gum up the MAF sensor. I used to run into this issue back on my old Mustang GT after cleaning my filter and over oiling.

AMG_LAWL · 11-22-2015, 05:16 PM

MAF.. there we go haha so much stuff to do to the car this coming week! ITs like a full time job

Quote:

Originally Posted by stevelp99

Its quite possible the Mass Air Flow Sensor (MAF) is dirty, especially if you run an oiled aftermarket filter, as they can gum up the MAF sensor. I used to run into this issue back on my old Mustang GT after cleaning my filter and over oiling.

mrMTB · 11-22-2015, 06:16 PM

Quote:

Originally Posted by stevelp99

Its quite possible the Mass Air Flow Sensor (MAF) is dirty, especially if you run an oiled aftermarket filter, as they can gum up the MAF sensor. I used to run into this issue back on my old Mustang GT after cleaning my filter and over oiling.

No MAF on these. Think speed density.

thekurgan · 11-22-2015, 06:16 PM

Quote:

Originally Posted by AMG_LAWL

MAF.. there we go haha so much stuff to do to the car this coming week! ITs like a full time job

The S65 does not have a MAF.

thekurgan · 11-22-2015, 06:17 PM

Quote:

Originally Posted by mrMTB

No MAF on these. Think speed density.

LOL, shit, we posted within seconds of each other. Cheers.

AMG_LAWL · 11-22-2015, 07:20 PM

LOL... well I can rule that out then. Thanks for the info bruhh

Quote:

Originally Posted by thekurgan

LOL, shit, we posted within seconds of each other. Cheers.

AMG_LAWL · 11-22-2015, 07:22 PM

I thought the intake filter may have been clogged or something causing the stalls but I did thoroughly clean my MC intake filter yesterday.. It was so disgusting.. so much black stuff and debris came out of it. But now its nice and clean/oiled up.. The only difference I noticed was that the engine and exhaust noise was way louder, so a bonus there I guess..

thekurgan · 11-22-2015, 09:12 PM

It sounds more like the breather valve but it wouldn't hurt to run a tank of techron concentrate and give her an Italian tune up.

padde2 · 06-23-2020, 09:58 AM

did this ever get resolved

Wally1552 · 06-23-2020, 05:40 PM

To OP and whoever may stumble upon this, i had exactly same symptoms with my car. I replaced my ICV and ICV hose and idling issues remained. Even though it never once gave me idling issues after refill, it turned out to be the fuel breather valve. The shop or where ever you take it too should be able to run ISTA and tests to pin point the issue. If I could do it again, i would have gone from cheapest fix to most expensive.

1) Check if you have bad gas
2) Check gas cap
3) check fuel breather valve
3.5) check O2 sensors
4) check ICV
5) CHeck ICV idle strips for clogging
6) check throttle actuaters

Jims M3 · 06-25-2020, 02:23 PM

I had an idle issue it ended up being an alternator, the alternator would drag at idle. New alternator and belt issue was gone, car idled fine.

11-21-2015, 11:38 AM	#24
AMG_LAWL E92 M3 99 Rep 508 Posts Drives: (2) E92 M3's & F30 320i Join Date: Jun 2011 Location: Playa Vista, CA iTrader: (0) Garage List 2016 BMW 320i [0.00]	So I haven't gotten to a dealer yet as my work schedule is pretty crazy right now. But last night I was stopped at a red light and my car was idling at about 400.... then the engine just stopped.. No service lights or limp mode lights, nothing no service lights at all. I just started the car like normal and went on with my night.... What could have caused this if my dash isn't lighting up like a christmas tree......
	Appreciate 0 Quote

11-21-2015, 12:14 PM	#26
stevelp99 Private 24 Rep 79 Posts Drives: BMW Join Date: Apr 2012 Location: Tx iTrader: (0)	Mine started out like that a few weeks ago, at random if I let the car sit at idle too long, then one day after a fill up it started to idle rough, I though the 2 were connected but it turned out to be a failing precat O2 sensor. I ended up with misfires, limp mode, increased emissions. The odd idling wasn't throwing any codes, and it wasn't until it got bad enough to actually find any error codes. Actuators and idle control components were inspected but couldn't find anything wrong until O2 sensor codes were thrown which led us to the O2 sensor. After putting in a new sensor the car has been flawless.
	Appreciate 1 Quote

11-21-2015, 12:38 PM	#27
redpriest Colonel 2147 Rep 2,527 Posts Drives: 2011 M3/Porsche 992 GT3RS Join Date: Apr 2014 Location: Bay Area, CA iTrader: (0) Garage List 2024 Porsche 911 GT3RS [0.00] 2021 Porsche 718 Sp ... [0.00] 2021 Mazda Miata MX-5 [0.00] 2006 BMW M3 [0.00] 2011 BMW M3 [10.00]	I have this problem as well. It's just annoying more than anything else - had the car stall a couple times, always after filling the tank, and only then. I should get around to getting it fixed.
	Appreciate 0 Quote

11-21-2015, 06:40 PM	#32
stevelp99 Private 24 Rep 79 Posts Drives: BMW Join Date: Apr 2012 Location: Tx iTrader: (0)	Its quite possible the Mass Air Flow Sensor (MAF) is dirty, especially if you run an oiled aftermarket filter, as they can gum up the MAF sensor. I used to run into this issue back on my old Mustang GT after cleaning my filter and over oiling.
	Appreciate 0 Quote

11-22-2015, 07:22 PM	#38
AMG_LAWL E92 M3 99 Rep 508 Posts Drives: (2) E92 M3's & F30 320i Join Date: Jun 2011 Location: Playa Vista, CA iTrader: (0) Garage List 2016 BMW 320i [0.00]	I thought the intake filter may have been clogged or something causing the stalls but I did thoroughly clean my MC intake filter yesterday.. It was so disgusting.. so much black stuff and debris came out of it. But now its nice and clean/oiled up.. The only difference I noticed was that the engine and exhaust noise was way louder, so a bonus there I guess..
	Appreciate 0 Quote

11-22-2015, 09:12 PM	#39
thekurgan Bad Lieutenant 232 Rep 3,517 Posts Drives: E90M3 Join Date: Aug 2007 Location: Sacramento iTrader: (0) Garage List 2008 BMW M3 [0.00]	It sounds more like the breather valve but it wouldn't hurt to run a tank of techron concentrate and give her an Italian tune up. __________________ 02 E39M5 \| TiAg/Schwartz \| Tubi Rumore \| Ultimate Ti Pedals \| E60 SSK \| Jim Blanton 3.45 40/100% \| Coby Alcantara \| StrongStrut STB
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06-23-2020, 09:58 AM	#40
padde2 New Member 0 Rep 7 Posts Drives: E92 M3 Join Date: Jun 2020 Location: Sverige iTrader: (0)	did this ever get resolved
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06-23-2020, 05:40 PM	#41
Wally1552 First Lieutenant 122 Rep 334 Posts Drives: 135i Join Date: Jun 2009 Location: HI iTrader: (0)	To OP and whoever may stumble upon this, i had exactly same symptoms with my car. I replaced my ICV and ICV hose and idling issues remained. Even though it never once gave me idling issues after refill, it turned out to be the fuel breather valve. The shop or where ever you take it too should be able to run ISTA and tests to pin point the issue. If I could do it again, i would have gone from cheapest fix to most expensive. 1) Check if you have bad gas 2) Check gas cap 3) check fuel breather valve 3.5) check O2 sensors 4) check ICV 5) CHeck ICV idle strips for clogging 6) check throttle actuaters
	Appreciate 0 Quote

06-25-2020, 02:23 PM	#42
Jims M3 First Lieutenant 454 Rep 312 Posts Drives: F95 X5M, F80 M3, C7 Z51 Join Date: Jan 2013 Location: Aledo, TX iTrader: (1)	I had an idle issue it ended up being an alternator, the alternator would drag at idle. New alternator and belt issue was gone, car idled fine.
	Appreciate 0 Quote