D3 MT Cold Rough Idle

[KA020L_L]

Hi

New member here of Alpina D3 MT

D3 is got 87k mls , got her just over a week and she is suffering with some issue . After cold start runs fine , but then 2-3 min later rough idle until warm , then runs fine. I suspect EGR blocked...but dont know , what is your advise ?

Also im under impression that this is linked somehow as from time to time i keep stalling her, sometimes 2-3 times in conditions which should never happen to me

Pulls strong above 1600 rpm no issue there .

What you guys think ?

Tia

Regards

[CaesarBob]

Welcome to the forum!

Have read through this thread, and the other thread linked in it, quite a bit of dicsussion on D3 MT's and the potential causes of problems. First step really seems to be, get the fault codes read/cleared and rechecked to see where to start looking.

viewtopic.php?f=38&t=24291

[KA020L_L]

Hi

I did read all this before posted .

Codes which i got :

4B90
3FF1
4B10

Sill hoping its the EGR clogged . Will clean over weekend together with MAF.

Regards

[DonFlintoni]

Hi

If the car has had dpf issues in the past then the inlet manifold and the EGR can become seriously gunked up. I had mine off and steam cleaned.

HTH

[DonFlintoni]

Allso, it could be a problem with the Pierberg pressure converter for the EGR valve. The vacuum hoses are also known to perish.
https://www.realoem.com/bmw/enUS/showpa ... Id=11_3659

[JordanSuth]

Worth swapping the glow plugs at the same time. I had 3 giving fault codes and the car is idling a lot better now. My car just hit 80k.