Cm570 engine brake vibration and weak jakes

[Marat]

So I fixed one thing but chasing a new problem now.
Changed out all 3 solenoids now the engine brakes work great.
Changed injectior on #1 cylinder and bubble tested again, im still seeing bubbles.
The bubbles push out right at damper marking C. So I figured maybe I made a mistake and its actually cylinder #2. Changed that injector with the one I took out of cyl #1 before wasting money on another new one. Im still getting bubbles at the same mark. From the first time I bubble tested its at the same mark, lookslike it’s between b and c but it happens so close to c that it could be c and a. Regardless I changed out both injectors im still getting bubbles. It has a bit of a rough idle especially when cold, mostly clears up once warmed up.

Any idea why I’m still seeing bubbles?