2882 is back, Fuel Trim Bank 2

[Reckless]

Quick Synopsis:

2882/2883 Came up at the End of May - Found out there were mice lodged in the DISA

http://forum.e46fanatics.com/picture.php?albumid=5062&pictureid=30135

So I:
Rebuilt the DISA with the GAS kit
Cleaned MAF
Cleaned ICV
Replaced Lower intake boot
Cleaned Throttle Body

Fast forward ~10k miles and 3 months to last night and SES kicks on again. 2882 this time and no 2883 to come with. Any ideas on why this would be. The only other thing I could replace would be the CCV but I would think both codes would kick for that problem.

Now I am thinking Passenger side O2 possibility because of the lone code.

Lambda Adaptations are +/- 3.91 so close to normal range and noticing slight lower MPG but not terrible. I cleared the code and getting ready to change the oil today and monitor the fuel trims.

Any thoughts, ideas, experiences?

Brian

[OmairK]

That is insane. holy shit.

[Hornung418]

What did the code reader say the actual fault was. Not familiar with 2882.

GS3 + TT4

[Dave1027]

- Found out there were mice lodged in the DISA
WTF? That's just freaky. Was your disa missing the small cover?

[Reckless]

not missing the cover, just had to be removed to clean the mice out.

Brian

[danewilson77]

Ok... So the mice just crawled in there and got stuck. Or were the mice possibly bred, in the disa, to aide in eliminating the 4k rpm dip perhaps?

Sent from my S4 > Mason, OH

[toddness]

This is unreal.

Made me think of the joke...

How many mice does it take to screw in a lightbulb....at least two.

[Reckless]

Ok... So the mice just crawled in there and got stuck. Or were the mice possibly bred, in the disa, to aide in eliminating the 4k rpm dip perhaps?

Sent from my S4 > Mason, OH


The thought has crossed my mind that they were in fact the ones operating the DISA valve, once the engine hits a rev that is too loud for their tiny ears, they start moving which opens the Valve. I didn't perform the PM mice replacement, so I guess they just fried up after a few years of hard driving.

On a more real note, they were eating the flame retardant mat under the hood and that crap is everywhere. I was bleeding the fuel rail the other day and I am still finding pieces of that stuff everywhere....

after fuel filter, fuel pump and new plugs, car feels like it i running like new. No codes as of yet, but I fully expect to still be chasing lean codes

[danewilson77]

:rofl

It's not a toy, it's a Droid > Sent from my S4 > Mason, OH

[Reckless]

Codes are back, only bank 2. Next will be Vanos and new VCG. I wish I could solve this problem, yet it is making me do maintenance instead of the mods I want. Win win win in the long run, but more frustration in the forefront. Will update after the holidays with hopefully good news and ability to move forward.

[ELCID86]

Frustrating I know. I was chasing lean codes on my coupe for months. Keep us posted on the PM.

[baz11]

how often do you set 2882/2883?

I also have a recurring 2883 code that has been ongoing every few weeks. Once i get a VAG cable I hope to begin troubleshooting with bmw flash.

[Reckless]

If I clear the codes they will be back within 250 to 500 miles currently. From what I can tell, once the LTFT (lambda/fuel trims) are +/-10% (if I remember correctly) for more than 5 seconds then it will throw the code, depending on the bank. I have been fighting these on and off for the last year, and seemingly each time I find something giving out, I fix the problem and then the codes will come back after 1/2K miles due to another reason. Each time bimmersoftware, common sense and this forum helps me diagnose and I work from there.

If you are battling these codes then get ready to do some PM depending on your mileage. Because these codes are for lean mixture, this means something is malfunctioning from fuel ratio, spark, or air ratio. From my experience only:
Rebuild/clean/replace everything on the intake side of the engine: MAF(C), ICV(C), Upper(RP) and Lower Boots(RP), DISA(RB) CCV(RP), Throttle Body(C)
Replace fuel delivery components: Fuel Filter and Fuel Pump
Replaced Spark Plugs - this is where I currently am.
VCG and Vanos - I am hoping this is the final straw for the codes - I can not visually see/smell any loss of oil but I am consuming ~1Qt every 7500 Miles

I am very confident in my findings so far and have reasons documented for each procedure I have taken on. If you have any questions let me know. Hope this helps.

Brian

EDIT: While puttering around the engine bay, I noticed a whooshing sound near the intake (closer to the DISA) I am now wondering if I did not do a sufficient job with the removal of the old o-ring when rebuilding the DISA. Will tear into this early next week and report my findings. Otherwise still wanting to move forward with VCG/VANOS/OFHG