O2 sensor goes dead mid pull

Cmiggz

Private
Jun 4, 2017
42
13
0
Ride
2008 ST 335i
So i recently was getting missfire in cyl 4,5,6 and turned out my mosfets went out. So i ended up upgradeing to msd81, did new plugs (gapped .019), coil packs, index 12 injectors and o2 sensors. Car is on 20psi and drive perfectly fine untill i go wot. 6k+ rpm and sometimes before i see the afr2 peak 20 and then goes back to normal then back to 20. Not sure whats wrong.
 

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Cmiggz

Private
Jun 4, 2017
42
13
0
Ride
2008 ST 335i
This is a better pic showing how it jumps to 20 afr
 

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iminhell1

Sergeant
Jun 17, 2018
419
207
0
make things easy on us,


Additional information

FirmwareInterfaceEngineTMAP_VAvgIgnDWPMethTriggerModeFFMethSafeModeMethAddMethScaleMethPSIE85_SetupVFF_Offsetfuel_30fuel_35fuel_40fuel_45fuel_50fuel_55fuel_60fuel_65fuel_70
30/139//2JB4 iOS 9432E Series - N542.023.9701620459915.10132707070707070707070

BoostSafetyPID GainAutoShiftRedFuel_OLFUA1st_limiter2nd_limiter3rd_limiterOptionsN20_TMAP6CylModeLastSafetyduty_15duty_20duty_25duty_30duty_35duty_40duty_45duty_50duty_55duty_60duty_65duty_70
34.025400012.015.10.064252505050505050505050505050
 

iminhell1

Sergeant
Jun 17, 2018
419
207
0
Are you on E85?
Yes - you need more timing. 1* isn't shit. at least 8* should be good/safe.
No - stop logging it. only slows the rest of the log speed, drags processor power down.

Looks like you lost #4 and #5 when it went lean, that's why it went lean. Check electrical connections to the coils, make sure grounds are clean, make sure coils are pushed down/snap onto the plug, etc.
 
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iminhell1

Sergeant
Jun 17, 2018
419
207
0
Click on that "datalog" on the left of the screen. Just upload and copy/paste graph code.


I didn't look at the HPFP. I don't know what the JB4 numbers mean, I kinda hate the way Terry decided to log/display things. Really shouldn't have been hard to offer a scalar number and a converted number option.
Could be the HPF is wonky because a couple injector connectors aren't fully seated?