2015 Silverado Truck Random Misfire + Significant Loss of Power!

[Gustavo]

So I've been trying to figure out what the issue is with this truck but unfortunately I could not!

Here's a brief:

Truck runs and drives great however when I floor it, it flashes the CEL.

Things that was changed to it are as follows:

1. Spark plugs and wires replaced
2. Intake manifold & TB have been cleaned
3. Fresh oil
4. Checked and inspected valve springs

Please notice the MAF (g/s) it reads low as well as the torque.

I am attaching the tune + bunch of logs

Appreciate your help and thoughts guys!

[sevinn]

Have you ran a compression test? Smoke check?

[cadillactech]

Ya, find which cylinder is misfiring and do the basics to make sure you are ok mechanically.

[Gustavo]

Thanks guys!

No compression test so far and all spark plugs and wires have been replaced.

as per the log it says 3 & 5 but they do seem fine

[pisces_0]

Potential lifter failure, though the cylinders you're seeing misfires on aren't DOD cylinders.

I just recently had one lifter in cylinder 7 (DOD) and one lifter in cylinder 5 (non-DOD) fail almost concurrently. Two bent pushrods and a scored cam lobe later, I'm now DOD-delete and am never looking back.

[Brand New Classics]

What is a smoke check?