09-27-2022, 01:22 AM | #1 |
New Member
2
Rep 13
Posts |
F90 running lean?
Hey guys,
Recently my car has been running lean for some time on bank 2. i have eventuri intake, catless downpipes and csf charge coolers installed along with bm3 ots tune. However Since these cars don’t have MAF sensors, what could be the cause of this issue? My o2 sensor are operational, i check all possible air leak spots and tightened all clamps (intake and charge coolers) but i still keep getting the code every time i clear it. Any advice? |
09-28-2022, 02:43 AM | #2 |
Second Lieutenant
155
Rep 272
Posts |
It may not have the best information, but if you haven't seen it yet https://f90.bimmerpost.com/forums/sh...=1679064sounds like the same issue.
|
Appreciate
0
|
09-28-2022, 06:26 AM | #3 |
Lieutenant General
5267
Rep 10,655
Posts |
Do you have the O2 feature engaged in the optional features in the BM3 tune? Might be automatic with Stage 2 tunes but I am not sure.
|
Appreciate
0
|
09-28-2022, 08:18 AM | #5 |
Lieutenant General
5267
Rep 10,655
Posts |
|
Appreciate
0
|
09-30-2022, 05:41 PM | #6 |
New Member
2
Rep 13
Posts |
|
Appreciate
0
|
09-30-2022, 05:46 PM | #8 |
New Member
2
Rep 13
Posts |
I removed my exhaust to instal an xpipe. However i look inside the downpipes from underneath and I noticed bank 1 downpipe is black from inside but bank 2 downpipe is more like white, or i would say clean unlike bank 1. So clearly there’s something different between the 2 banks.
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|