Bank 2 running rich, high MAF reading ( still showing reading when unplugged?)

[E46 M3]

STFT keeps dropping to -30.47% at one stage it was both banks but now it just seems to be bank 2

https://datazap.me/u/cowhole69/log-1758434223?log=0&data=6-8-11

I removed my Eventuri intake and threw on my OEM airbox and now it's down to -20

However I'm still waiting for a new intake elbow gasket to arrive as it does leak but surely not enough to cause this?

Decided to start the engine with the maf unplugged and it idled at the correct RPM however as you can see in the log it's still showing MAF readings? How?

https://datazap.me/u/cowhole69/cleaned-maf-swapped-eventuri-stock-airbox?log=0&data=6-8-11

Also can anyone comment on my O2 sensors?

https://datazap.me/u/cowhole69/log-1758434223?log=0&data=8-13-19

Another odd thing was yesterday the fuel guage was pinned to empty with the warning light on, but after removing the eventuri the fuel gauge is working correctly again.

And should the MAF reading be 0 when unplugged? Why is it showing 6 g/s?

Thanks.l

[karter16]

Decided to start the engine with the maf unplugged and it idled at the correct RPM however as you can see in the log it's still showing MAF readings? How?

Disconnected, the ADC (Analogue to Digital Converter) input will float. The DME will continue to read the ADC, even though it doesn't use the value having detected the MAF sensor is in an error state.


Sent from my iPhone using Tapatalk

[sapote]

SAlso can anyone comment on my O2 sensors?

b1s1: it only switching after engine running for 10minutes -- should be after 1 minute the most. Something is wrong but I don't blame the o2 sensor. The cause is DME only closed the control loop after 10 minutes for b1, for whatever the reason, maybe too rich is the cause.
B2s1: also switching late -- around 3.5 minutes. O2 sensor is fine.

I notice the coolant is not hot enough for a good reading -- should log again at 83C coolant temp to see what MAF reading is. So far I think your MAF is bad, giving too high data causing too rich with negative STFT.

Unlugged MAF: it is a calculated data and not the normal measured from the ADC converter, so I'm not surprised that it's not 0.

[E46 M3]

b1s1: it only switching after engine running for 10minutes -- should be after 1 minute the most. Something is wrong but I don't blame the o2 sensor. The cause is DME only closed the control loop after 10 minutes for b1, for whatever the reason, maybe too rich is the cause.
B2s1: also switching late -- around 3.5 minutes. O2 sensor is fine.

I notice the coolant is not hot enough for a good reading -- should log again at 83C coolant temp to see what MAF reading is. So far I think your MAF is bad, giving too high data causing too rich with negative STFT.

Unlugged MAF: it is a calculated data and not the normal measured from the ADC converter, so I'm not surprised that it's not 0.

Thank you, I did just watch a video on inpa and learnt my logs aren't long enough.

I believe my thermostat is tuck open and have ordered a new one, still waiting not sure what is up with our post atm it's taking forever.

Will be another 2 weeks to order a new MAF also, thanks again.