Misfire Low RPM w/ Occasional CEL - Concern?

[RedRaider17]

Was able to re-create the issue and got logs for it as well. I included the only file that I could upload via datazap since the file size max is 3MB. But I zipped the other files as well. Its gotten progressively worse that it happens every time I drive now. Any insight would be helpful.

https://datazap.me/u/redraider89/log-1666386976?log=0&data=6-13

 

[StorableComa]

Was able to re-create the issue and got logs for it as well. I included the only file that I could upload via datazap since the file size max is 3MB. But I zipped the other files as well. Its gotten progressively worse that it happens every time I drive now. Any insight would be helpful.

https://datazap.me/u/redraider89/log-1666386976?log=0&data=6-13

You're running really lean the whole log. You're always above your SP for Lambda. SP also seems a bit lean at 1 for 50% throttle, but I could be wrong. Your Long term fuel trims get really weird at the end of the log. It's pulling fuel at idle it looks like.

Maybe someone else can chime in with more info. Nothing else really jumps out at first glance.

 

[Diggs24]

I would check the downpipe real good. Undo the clamp, look for any exhaust marks past the fire ring. Could be an exhaust leak at the DP connection. Look for cracks on the DP. Also, I would try and snug down the o2 sensor, maybe it worked loose a bit over time.

 

[RedRaider17]

So got some bad news. Did a compression test and cylinder #2 was significantly down on compression. Not sure what the cause is yet but will update later once a root cause is found.

 

[RedRaider17]

Looks like the engine may be toast :/. 90% compression loss on cylinder 2. Looks like air is getting through a hole in the crankcase. Sort of at a loss of what to do next since never had this happen before.