K1600 missing - no codes

[Pawkee]

2012 K1600GTL
Odometer : 4968.1 mi

 Vehicle Order :
   Date : 0811
   Series : K048
   Type : 0612
   Paint : 0N47
   Upholstery : 0000
   Extras :
   134 : Adaptive Headlights
   138 : LED additional headlight
   143 : Bluetooth interface
   182 : DTC
   376 : BMW US Radio
   416 : ESA
   417 : Central locking system
   430 : Safety pack
   431 : Equipment package 1
   530 : Tyre Pressure Control (RDC)
   603 : Alarm system
   792 : Seat bench, high
 

Fuel pump replaced - recall

Missing at low RPM
GS911
No check engine light - No codes
I have been hunting this problem for over a month and stumped.

Was getting oxygen sensor #1 out of range. Disconnected each sensor, threw code but made no difference while running.  Replaced #1 sensor with used eBay coil.  No more codes.  Problem still happening.

Replaced all six coils.  No difference.  No coil code. Pulled plug on each coil and check engine light came on for each with a code. Cleared all codes. Reinstalled old coils. I opposite order.  Problem still happening.

Pulled all six plugs - all look the same.  Reinstalled in opposite bank.  Problem still happening.  No change

Problem is definitely with cylinder 4, 5 or 6.  I held my hand over exhaust and could feel it missing (hunting) on right, starboard, side.

XBMSX : -
Controller : 0x0F8B00
Controller Name : XBMSX
Controller Type : Engine Controller
Serial Number : 0170014021
Manufacture Date (YY/MM/DD) : 12/01/08
Program Count : 2
Program Count Maximum : 60
Battery voltage : 12.00 V
VIN : WB1061204CZZ22432
Model : K 1600 GTL (K48)
Factory I-Level : K001-11-08-500
Actual I-Level : K001-16-07-510
Backup I-Level : K001-15-03-510
Odometer : 4968.1 mi
Operating hours : 122h 25m 04s
Riding Mode : 2
Firmware Date (YY/MM/DD) : 15/02/27
Kilometers when programmed : 0.0
Number of FW configurations : 5
 HW Electronics (HWEL) :
   Firmware ID : 0x08A3
   Firmware Version : 002.000.000
 Bootloader (BTLD) :
   Firmware ID : 0x0C49
   Firmware Version : 004.000.000
 SW Memory Image (SWFL) :
   Firmware ID : 0x0CBD
   Firmware Version : 008.000.001
 SW Memory Image (SWFL) :
   Firmware ID : 0x0D2F
   Firmware Version : 008.020.000
 Coding Data (CAFD) :
   Firmware ID : 0x08A2
   Firmware Version : 000.008.007
Fault Codes : 0
No Faults found : 

I shared a couple docs on my google drive:
Lambda spreadsheet with cylinder temps
Video with audio of engine missing
Pics of spark plugs.  All look similar
https://drive.google.com/drive/folders/1-AUtQjONGTz7OPtf-QqiMLrC6qexQYPH

Thoughts?
Anything I can scan or capture to help diagnose?

By the way:
Cylinder numbering; #1 is port/left/shifter side
Oxygen sensor location; #1 same as #1 cylinder

[Pawkee]

Any ideas from anyone?

[Ruan]

Hi Pawkee

Apologies for the delay. That sounds like pretty rough idling, that could be the bike missing, but considering all the troubleshooting you've done - I would start with resetting the adaptations first, then idle/ride the bike to operating temperature. If the problem persists thereafter, run the injector test on all 6 injectors, if they've built up carbon and dirt over the years, you should hear if one or more is not pulsing similar to the rest.

Kind regards
Ruan

[Pawkee]

Ruan,
Thanks for the reply. 

I was planning on pulling all the injectors and cleaning them.  I have an ultrasonic cleaner and ordered the device to pulse the injectors while submerged.  I was then going to spray carb cleaner through the injector while pulsing the injector to see if there are signs of a clog. 

If they show signs of a bad pattern or no improvement after reinstalling them, then I will send them off to be professionally cleaned and bench flowed.

I think I will try your idea first.  Much easier.  😎

[Pawkee]

I reset the adaptations, then idled the bike to operating temperature. The problem persisted. I then ran the injector test on all 6 injectors.  They all sounded the same.

I recorded new video holding the microphone up to each exhaust.  Definitely more pronounced on left (1, 2, 3) side.  Uploaded to my google drive as K1600GTL_stuttering.mov.

https://drive.google.com/drive/folders/1-AUtQjONGTz7OPtf-QqiMLrC6qexQYPH

Thoughts?

Is there some realtime values I can capture that may give me some idea what the problem is?

[Pawkee]

Turns out it was a bad spark plug.

Went ahead and replaced all six plugs.

Great price at https://www.sixityauto.com/

NGK Laser Iridium 92288 LMAR8AI-8 Spark Plug

$66.33 for six plugs shipped.