Super knock. On cylinder 2

Subwoofer

Sergeant
Jan 9, 2020
267
48
0
Ride
335i
Decided to do a log earlier, got a super knock on cylinder 2.

Has been persistent.
O2 sensors possible are dead/dying?
OEM injectors.
New 2 step plugs around 2K miles ago.



Anyone got experience with this ? Don’t really want to blow the motor up.

Might try compression test
 

zomski101

Private
Dec 28, 2019
47
8
0
Ride
335i
I got super knock codes when I was playing around with larger spark plug gaps on 2 step colder plugs. Anything larger than .22 and I would sometimes get super knock on cylinder 4 shadow code.
 

Subwoofer

Sergeant
Jan 9, 2020
267
48
0
Ride
335i
I got super knock codes when I was playing around with larger spark plug gaps on 2 step colder plugs. Anything larger than .22 and I would sometimes get super knock on cylinder 4 shadow code.
I see. My 2 step are gapped at 0.20. I wonder maybe 0.18 might make a difference. I’m going to keep an eye on it. It’s looking likely towards the fuel injector, for now