Cold Start Problem E92 M3

[DAbed]

Hello my fellow m3 colleagues,

58k miles on my e92 m3, services done by my tech (he's brilliant) but car is not under warranty and i never take the car to the dealer anyways. Anyways, recently the past month or two, the car idles very unusually only during the cold start ups. The RPM needle jumps up and down and it seems as if the car is about to shut off, like its struggling to breathe and then the code is thrown (Engine malfunction, reduced power). But when i turn the car off and back on immediately, no code is thrown and everything seems fine? I just replaced the motor mounts not too long ago so i know that's not the problem. Could it be that my battery is low? or something to do with the throttle actuators? Could use some insight, my tech is out of town at the moment. Thanks.

[EJT86]

I'm currently having a problem with my throttle actuator. But judging from what I've been reading sounds like maybe an idle control valve. I'd say find a place or dealer to have it scanned and research the codes. Or if you don't mind waiting a couple days order a tool do scan it yourself which is what I'm doing
Good luck

[Bhdien]

Mine did the same thing. Changed out the idle control and it fixed it. But I can't say it will be a fix for your car.

[DAbed]

ya im starting to think its the idle control valve because the battery is pushing 12.4-12.5 with the car off and 14.5 with it on (maybe the alternator is helping with the charge). I mean the battery may be slightly low but im not sure if thats the only problem.

[M3 Esq]

I had the same issues a few months back. I had a rough idle, then the car stalled out. Dash lit up with all kind of error messages, reduced power, DSC malfunction, emissions malfunction, etc. Had to have it flat bedded in. It was throwing idle actuator and idle control faults. They replaced the idle control valve but that didn't solve the problem. They traced it to a DME problem and updated the software. I haven't had the issues since. GL!

[thekurgan]

Problems with the fuel tank vent valve can cause this also, as can bad fuel.

[BKarktic3]

Originally Posted by EJT86

idle control valve

this

[Titan_br]

Any news how they got fixed?

http://www.justanswer.com/bmw/4yhni-...-car-left.html

I am having the same problem of this link above, but there is no the answer

I am changing everything without sucess.. even DME program..

[yidgyi]

fuel tank vent valve / idle control valve

[Titan_br]

Originally Posted by yidgyi

fuel tank vent valve / idle control valve

Why all the time I unplug and plug the battery it starts ok?

What is the part number of IDLE VALVE ??

[KawBoy]

It should be this one perhaps?

13417838024

[KawBoy]

https://www.ecstuning.com/b-genuine-...e/13417838024/

[DAbed]

idle air valve control fixed the problem

Originally Posted by Titan_br

Any news how they got fixed?

http://www.justanswer.com/bmw/4yhni-...-car-left.html

I am having the same problem of this link above, but there is no the answer

I am changing everything without sucess.. even DME program..

[Titan_br]

Well, it seems i will have to buy it..

i am tired of unplugging and plugging the battery, sometimes it works, sometimes not.

I found other places the guys did solve, but i cant get in touch with them to get the asnwer.

http://www.justanswer.com/bmw/5ho8n-...d-someone.html

http://forums.m3cutters.co.uk/showthread.php?t=125392

http://www.justanswer.com/bmw/4yhni-...-car-left.html

[DAbed]

ya i would replace it, sounds like my issue.

heres parts that are certified that are closest to oem specifications

http://www.rockauto.com/en/catalog/b...ac)+valve,6072

or you can get oem from bmw but will cost more. hope that helps.

[Titan_br]

I still on trouble.

Replaced the ICV, coolant temperature, alternator, TAs.. and I still with the cold start problem.

[Titan_br]

The only error I have is this one.

27A6 - tank-venting valve activation

Which I replaced the PN 13907838281

https://www.ecstuning.com/b-genuine-...e/13907838281/

[elm3]

The ICV will trigger a trouble code. It did mine. Which I changed the ICV and I still had the idle fluctuations and stalling. I changed the fuel tank breather valve and it quit fluctuating and stalling. It idles smoothly and cold start ups are just like new. No idle surges.

[Jacooobs`n]

Originally Posted by elm3

The ICV will trigger a trouble code. It did mine. Which I changed the ICV and I still had the idle fluctuations and stalling. I changed the fuel tank breather valve and it quit fluctuating and stalling. It idles smoothly and cold start ups are just like new. No idle surges.

What kind of faulty codes did you get on the ICV and/or fuel tank breather?
Thanks in advance..

[Titan_br]

Originally Posted by M3 Esq

I had the same issues a few months back. I had a rough idle, then the car stalled out. Dash lit up with all kind of error messages, reduced power, DSC malfunction, emissions malfunction, etc. Had to have it flat bedded in. It was throwing idle actuator and idle control faults. They replaced the idle control valve but that didn't solve the problem. They traced it to a DME problem and updated the software. I haven't had the issues since. GL!

Who this this software update?

[SEFcollector]

Originally Posted by Titan_br

Who this this software update?

Did you manage to solve the problem? what was causing it? have something similar, already changed the IVC but the fuel valve breather I didn't change so it might be that.

[jmeenach]

Originally Posted by SEFcollector

Did you manage to solve the problem? what was causing it? have something similar, already changed the IVC but the fuel valve breather I didn't change so it might be that.

+1.

I changed my fuel breather valve and still have this issue. Multiple shops have pulled codes and nothing has appeared, but the cold start issue is pretty obvious (to the point the car will choke and jump without a 2+ minute warm up). I'm thinking I need to pull the plenum and fuel rails to see if there is a bad injector, look at coils and plugs, and then last swapping the ICV if those appear to be OK.