Knock Detected BM3

[Jaizero]

Originally Posted by BruskSeeKShots

Got it, well I just check my bootmod3 app and I don’t even have an option for the long term fuel trim readings, I scrolled through the entire option of data to read and I only have STFT

Yes you do.

You need to go into Dashboard at the top of the screen > Configure Dashboard > Available channels

There you will have "Default", "Advanced", and "Others".

Look for LTFT Bank 1 and 2.

Also make sure STFT Bank 1 and 2 are activated.

You can only have so many channels activated at once so you may need to remove some of the unneeded channels.

[BruskSeeKShots]

Woah I never knew there were this many values to read, okay I just turned them on going to go for a drive and see what my average readings are. Do you recommend turning on any other channels which could help with diagnosing this issue or just the ltft and stft? Thank you again for the help

[Jaizero]

Originally Posted by BruskSeeKShots

Woah I never knew there were this many values to read, okay I just turned them on going to go for a drive and see what my average readings are. Do you recommend turning on any other channels which could help with diagnosing this issue or just the ltft and stft? Thank you again for the help

Leave everything on the default screen on except for "Load act", "Load Target", and "Relative Air Filling", turn those off.

Under Advanced turn on

BM3 Flex Ethanol % (Sensor)
BM3 Flex Sensor Fault
Boost Pressure (Target)
(RAM) Ignition Timing Corr. Cyl 1-6
(RAM) Load (Actual)
(RAM) Load (Target)
(RAM) Torque at clutch (Actual)
(RAM) Torque at clutch (Target)
Everything else off.

Under Other turn on
LPFP Act (RAW)
LTFT Bank 1 (CtrlFact)
LTFT Bank 2 (Adapt)
Wastegate Duty Cycle
Wastegate Duty Cycle (Bank 2)
Everything else off.

With the BM3 Flex Ethanol % activated, you can add it to your dashboard and see actual ethanol % as read by the flex fuel sensor.

Any of these can now be added to your dashboard and be monitored.

[Jaizero]

You need to go back to stock intakes to diagnose properly.

Get those back in and up your ethanol content to E40 or more then relog.

[BruskSeeKShots]

Originally Posted by Jaizero

You need to go back to stock intakes to diagnose properly.

Get those back in and up your ethanol content to E40 or more then relog.

Okay I acknowledged all of that information thank you so much again for the help, diagnosing this issue has been a pain in the ass but you have made it a little easier! Mind if I pm you in a few days or so with an updated catalog with the stock intakes and on e40? Don’t want to flood this thread with replies haha.

[Jaizero]

Sure, please do!

[NoorSinghJohal]

Hey I’ve been having the same issue with my car, so I went ahead and selected the same data logging parameters Jaizero suggested.

Currently on revision 3 of a my custom tune.

Kratos s55 bi turbos
Dorch hpfp
Eu5 injectors
Precision race works lpfp
F8S plugs
B58 coil packs

Been having these knocks since the first basemap of my tune, boost is still conservative and we haven’t turned up the car really.

Any idea what could be causing this and if it’s a serious concern?

Thanks


https://bootmod3.net/log?id=66b67281b6e7497c3ac5d37b

[wheela]

Originally Posted by BruskSeeKShots

Hello everyone hope all is well. I have noticed that after data logging my car I get a knock event at WOT sometimes and sometimes not. I have been data logging for a while and have not had knock events until now. I have also noticed a knock event being shown in just daily driving. My car has been running rougher lately and has been causing my AFRs and STFT to increase when driving around the city, however, they do clean up when I am under load. I am wondering if one of you can look at my data logs and see what is potentially causing the knock event to be recorded as I can not seem to find what is going on. I am currently running, catless DP's, single mid pipe, NGK 97506 gapped to 0.22, BMS intakes, upgraded charge pipes, a bm3 flex fuel sensor, and running a flex fuel stage 2 multimap of about e30. I have posted a log below of a WOT pull from 3rd to 6th gear. Thanks!
Datazap: https://datazap.me/u/bruskseekshots/...m3?log=0&data=

I only looked at the timing corrections in your log, and I only saw a few random corrections on one cylinder at a time, and they were always 3 degrees or less. That's not bad at all, I wouldn't worry about it if it was my car. Corrections at part throttle are completely normal and expected. I don't know the exact reason for the low-load corrections, but suspect it could be part of an octane monitoring routine in the DME - it would make sense for such a routine to run at low load where there is negligible risk of engine damage. My $0.02 anyways