b7 rs4 bank 2 running rich and lean with codes on the same bank?

B6/7 S4/RS4
#21

Just out of curiosity, try the following logging for the misfires. The recommendations by the other smart(er) guys in this thread come first of course.

Log block 3 with one or more of blocks 15, 16, 17.

Or use Advanced Measuring blocks and check off all block 3 measurements and the misfire counter measurements in blocks 15-17. So 8 misfire counter measurements and 4 measurements from block 3. This way is preferable since you get all the info in one logging session.

You’ll need to go through the second ecu controller (“Engine-II” controller under the drivetrain tab IIRC) to get the misfire blocks to populate.

Log the following use cases:

  • Idle

  • Light throttle (cruising style, 0-18%) holding at various RPMS (2k, 3k, 4k) while driving in various gears.

  • heavier throttle accelerating

Just curious to see which cylinders are misfiring and under what conditions (Since those codes aren’t in your original post)

#22

Looks like a I have a slight leak

http://i1025.photobucket.com/albums/y318/rs4tony/carbon%20pics/7D32700E-9CA9-4898-ABF3-69C3C11CA2E7.jpg


http://i1025.photobucket.com/albums/y318/rs4tony/carbon%20pics/5BD1E772-EA52-4DA1-9F17-8490538FDAAD.jpg

#23

can you film that with someone revving it? Throw some smoke in or put some baby powder there and see if it blows everywhere on idle/revving

#24

I can try at a later time

#25

Eek. I often times forget what happens to snow state cars.

#26

mhmmm

#27

lol wait until you see salt stains that end up in the engine bay somehow…

#28

Would a exhaust leak cause misfires by mis reading the exhaust fumes and calling for more/less fuel which could cut back fuel needed to ignite?

#29

Yep, it almost looks like coolant stains. Annoying stuff, I wait until spring to clean the engine bay.

#30

I ordered plugs that were ngk and noticed it was in a platinum edition packaging indicating platinum plugs. I don’t recall my past plugs being platinum. Maybe the shipper sent the wrong version plug?

#31

http://ngksparkplugs.com/part_finder/car_truck_suv/results.asp?engineid=1432

You’re fine. Just check your part# against the link.

#32

Seems like 8 new injectors did the trick. And def carbon build up after 500 miles of cleaning LOL

#33


http://i1025.photobucket.com/albums/y318/rs4tony/carbon%20pics/79E7A902-0F59-441B-9BB3-60E29A9F1E91.jpg


http://i1025.photobucket.com/albums/y318/rs4tony/carbon%20pics/2C067765-2A9A-4D06-B243-03E0228E4419.jpg

#34

Wow only 500 miles. It’s hard to justify spending $ to have it soda blasted or have my Indy remove the manifold and scrape it myself as either way all that hard work or $ will inevitably be spent again… I had my coils/plugs/front o2 replaced and smooth sailing since. Seems a good place to start with these kind of issues. Hope everything worked out tony. I know we were talking o2 replacements the other week and I guess that didn’t do the trick. Audis like to keep our wallets light but it’s worth it.

#35

Running with malfunctioning injectors probably didn’t help the carbon buildup. :frowning:

#36

yeeppp… we had the valves spit shinning clean too. and we used the soda/walnut blaster. new injectors seem to have done the trick, hopefully the rich and lean codes go away too! here’s a picture from after the cleaning.


http://i1025.photobucket.com/albums/y318/rs4tony/carbon%20pics/EBCBCAF8-FD38-48A1-88C9-F6C7F8D113C7.jpg

#37

sorry, don’t know how to edit posts on here but just something to look at when your manifold is off, i found that the passenger side bank flaps have a bit more play then the driver side… i didn’t go to investigate more because i’ve never had a fault code or power loss from it but just take a look and see if you guys have that problem too…

https://www.youtube.com/watch?v=oqCSrK0mNFY

#38

So you did the cleaning like three days ago and already ha e 500 miles? Do you drive the coolest cab in the northeast, or do you have a long commute?

#39

He drives a lot. Lol I believe it was Tony that put 40k miles on our clutch in one year.

#40

;D

lol nooo no cab here… companies should have me R&D new parts considering the milage i put on this thing to find the in’s and out’s of products :wink: