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Wanted to provide an update after running another compression check that showed about ~130 while running, cold and warm....

However, started looking at Plug and Wire...

DOH!, Dont ask me how,...

THANKS!


Yep, all cylinders, all wires, plugs, coils. Couple cylinders, in fact #5 used the "Granatelli Motor Sports Malevolent Coil Packs" just in case spark was weak.


Have performed the...

Ok, Various logs collected and MisFire counts accumulating, as noted previously, Cylinder #5 is out of bounds.

No it has spark, compression is ~145 lbs, injector is flowing good....

Few logs...

Have the P0300 Re-Enabled now and will run a logfile once sun cool's off a bit, truck is outside in the heat....

kewl, thanks.

No MisFire related DTC's:

Protocol Info: J1962: CAN, 500 kb/s

ECM: 7E8, CAN, ECM -EngineControl - E67, GM Gen4
VIN: 1GTH5MFP4B8123921 - 2011 GMC Canyon SLE, 5.3 L, 8 Cyl...

Answering for any others.... Since Suite 5.0, There is "Free" training you have to do and link your MPVI with a device code... --> https://tunertools.hptuners.com/Training/Course/Content
See -->...

Do not have a "log details" menu selection exposed, tried exporting to csv and no data, text strings containing P0

All plugs are firing, "throwing spark" used the inline spark tool to visualize the spark, strength of the spark may be another issue?
All the header tubes get above 180 degrees when measured with...

Unable to toggle the P0300 to Enabled?
Is this some licensing issue or the tune is mucked up or some other process to enable the P0300, which I think enables the MisFire detection?

Interesting, if I open any log files, then DTC's are not readable?
Only after connecting to vehicle can DTC's be read and the only DTC triggered at the moment is the lingering P0741 "P0741 OBD-II...

Replaced/Swapped coil after that code was thrown. Old tune file shared, sorry. See more recent logs attached.

Nope, after the Crank Sensor ReLearn the P0315 is not being thrown, not sure why, have tried multiple times, including in the log's attached.
Specifically -->...

Umm, sorry, where do I enable MisFire detection?

--> MisFire_Detection_ABove375rpm_Sep122023.jpg

Doh!, sorry for the newb mistake. I am ignorant to most of this stuff, sorry.

Attaching logs with misfires still disabled, will produce with misfires enabled shortly.


...

Um, if any of those scenarios were a problem, then Mis-Fire would reproduce during Crank Sensor Re-Learn process.

With that said, only 1 of those not checked is the "leakdown", which as mentioned...

RE: Also possible that you have partially clogged injectors and as the OL fueling is removed it's getting too lean on a couple
--> Injectors flowing good, Compression ~145 all cylinders, New coils,...

RE: continue ignoring misfires until it relearns the crank position
Are you able to elaborate, when I mention Mis-Fires, these are not ECM reported Mis-Fires, these are obvious engine not running...

Um, Ok, great advice, have a nice day. -> "This message is hidden because blindsquirrel is on your ignore list. "

Thanks for the comment, the description in no way should be interpreted as suggesting executing the Crank Sensor ReLearn will resolve a Misfire condition!

What the description tries to ask/convey...

RE: ..never done the relearn by slowly applying throttle, just put it to the mat until it cuts off and decelerates on its own
Ok, from 1k to 4k "slowly" means in about 3-5 seconds, not a WOT type of...

LSX 376 B15 ~30k miles with TVS-1900 Maggie and BTS Stage 2 Forced Induction Cam.....

Been chasing misfire at operating temperature...

Does not reproduce at initial/cold-start, begins as...

Thx 4 confirming. Was the conclusion had come to, GM must be sharing Fuel Controller programming/tune/flash, specifically "Name field" across many controllers/vehicles.
Guess is Fuel Controller...

Right on, that's "GM CVN Lookup web site" helpful to gain confidence FSCM has not been reprogrammed.

Not sure why when read reports Hardware as "FSCM A, FSCM, 2011-2012 CTS-V" GM must have shared...

If unplug the FSCM then the controller does not show when Read vehicle, so this controller and segments are read from the FSCM, not the ECM.

Is there a way to re-program the FSCM to be oem...

Know for sure the FSCM physically installed is NOT for a CTSV, the FSCM installed, mounted is the OEM original factory installed --> PN# 20791901

If use the "Double click to remove" and then...