Help! ROUGH IDLE AND NO CODES

[Socal.M2]

Hey guys about a week ago my car started acting a little wierd. A little background, its a 2013 m3 with about 45k miles on it.

When i start the car and drive it for a while its completely normal, then after 20 mins of driving or so when i come to a stop the idle drops to about 550rpm and the car starts to idle a little rough. when i push in the clyutch the idle goes back to normal, then drops back when i let off the clutch. same with the AC... when i turn on the AC it brings idle to normal and its not rough.

I have replaced the fuel breather valve and it didn't fix the problem, also my battery had low voltage so it was time to replace it. after the battery change it seems to not idle quite as rough but its still doing it. I cant for the life of me figure out what is going on.

any ideas or advice would help a lot

[NeverL8]

Idle control valve?

[Socal.M2]

It was my impression that if the idle control valve was having issues i would be having idle issues more consistantly. it only happens after some spirited driving once the car is warmed up.

[NeverL8]

Hmm, I would start with idle control valve and plugs and see front there

[Ajolives]

Low pressure fuel sensor?

[Socal.M2]

Originally Posted by TheRussski

Hmm, I would start with idle control valve and plugs and see front there

Precision dynamics in orange county seemed pretty confident its the idle conrol valve. I will update this thread this week on if the problem is solved