It's quite a lot to pull one of the valve covers versus the other side. But if you have access to a decent scan tool that can read what the camshaft timing is, it will be under live engine data.
There will be a data PID that should state Camshaft timing- Actual and Desired. If you find that the "Actual" is way off from what the engine computer (PCM) thinks it should be, "Desired". Then there might be an issue with the chain, tensioner, possibly a camshaft actuator which is responsible for advancing or retarding the camshaft valve timing or a broken chain guide can cause that entire bank to misfire like this. The fastest check would be with a scan tool since you don't need to take anything apart to see what the camshafts are doing.
If there is reason to go further into the timing chains, then checking the timing marks by pulling the valve covers and lining everything up would be a way to check it.
I would also make sure the oil level is up to where it should be just to verify that.
If you have access to more technical testing, using an oscilloscope and doing a relative compression test would show if that bank of cylinders is all low on compression. You could even try a clear flood mode test. Which is where you will hold the gas pedal to the floor and if the vehicle has Clear flood mode it shouldn't start. And you can listen to the cranking cadence, and you should hear an uneven type of noise that's caused by low compression cylinders.
Here are a few guides to help but try a clear flood cranking with the gas pedal to the floor, If the vehicle starts it doesn't have clear flood mode, but I think it should. Even record a video with your phone if you want and post it here and we can see if it's possible to hear anything odd about the cranking cadence of the engine.
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Monday, August 28th, 2023 AT 12:06 PM