1 of 2 things are occurring here.

1. The camshaft is indeed misaligned with the cam gear. I have done the AFM delete on these engines and even having it pulled out and sitting on an engine stand the cam dowel is very difficult to align with the cam gear because these cams can move back about a 1/2 inch in the block making you think the dowel has seated but it actually has not. When you install the cam bolt it is torqued to something crazy like 85 ftlb + 60 degrees and it will hold the cam gear from spinning with mere friction. Some unlucky people have it slip while the starter spins the engine, it comes out of time and bends valves. Others get a rough idle and will run but will set a timing correlation code. If this guy installed the cam while in the vehicle it is even more likely something like this has happened and even tho the cam and crank signals are correct (because the phaser itself is correctly timed to the crank) the cam is not aligned to the phaser and the fuel lobe is out of sync with the open and close of the solenoid. It might run with the sensor unplugged because the PCM probably has a limp mode home strategy for if it ever loses cam signal the vehicle wont shut off. It might change how the solenoid affects fuel pressure and may display the "engine power is reduced".

2. In the tuning process they changed the fuel lobe leading and trailing edge tables. Some aftermarket cams come with a larger fuel lobe to support any power gains if the cam profile has been altered. When this is the case you must go into the PCM files and adjust the fuel lobe leading edge and trailing edge tables to reflect the increase size of the fuel lobe. This tells the pcm when the fuel lobe is beginning to push up on the HPFP and when it is at the bottom of the travel so it can properly operate the fuel solenoid. I know the cam he says he installed is a 6.6 L8T cam which should be the same as the 5.3 fuel lobe but in the tuning process that information could have been skewed and they have made incorrect adjustments to these tables causing the issue we see here. Reprogramming with SPS2 might not overwrite those tables back to stock. Im not really sure how deep into the OS the reprogramming will overwrite and would need a new PCM to fix or those tables set back to stock with the tuning software.

Ivan, Worth your weight in gold on this one!  Great job!

Can't wait to see the conclusion!!! Thanks Ivan!

While a good cam to crank waveform indicates the two reluctor wheels are in time to each other, the cam (or crank) could still be shifted mechanically in relation to its reluctor wheel. I would like to see the waveform on both trucks with a pressure transducer channel added to help verify the physical location of the pistons in relation to the valve timing events. Even that wouldn't rule out the fuel pump lobes being possibly indexed incorrectly (in relation to all the other cam lobes). That would require some physical inspection with a degree wheel and a dial indicator (on both a known good and the suspect vehicle).
While it's possible that bad programming in the pcm could cause the issue, I think it's more likely that the cam is not timed correctly to its own phaser, like In the internet case, you sighted with the cam dowel misaligned.  You would have had good cam to crank waveform relationships in that case, and the resulting symptoms were the same.

Ivan, I can see a step ladder in your future toolbox, awesome job troubleshooting this problem.

Great video Ivan. I’m a DIY’er amateur, but the usefulness of a scope is evident to even me. It looks like it can be a powerful tool that can save you time and money

You are great at your job. These companies need to quit complicating these engines.

Did the afm delete on my son in laws 19 a couple years ago.  It ate a lifter and cam at 65k.  Used the delete kit from Scoggin Dickey Chevrolet and the Diablo tuner to unlock the computer and reprogram the afm.  Between the afm delete, the idle engine shutoff delete and the retune the truck runs far better than it did stock.  And it only lost 1/2 mpg

Interesting case study, Ivan.  Well done.  Looking forward to the conclusion!

The automotive community are good people.  Thanks kids for the prayers and good wishes.  Mac is conscious, but still on the ventilator.  Hopefully he will be taken off of it today.  God bless all of you.  ;)

Wow im thinking of  doing  a cam on my 07 but , im going to  sell it and buy another obs! Btw your really  good at your job !

WOW!   These new vehicles are out of control complicated!     Thanks Ivan , I'm on stand by for part 3 !   👍👍👍

I've been watching you do this work for years and know better than to bet against you, if you say it's bad it's bad, great job, very interesting diagnosis, of course I'll wait for and watch the conclusion but I have faith in you

Oh boy have I seen this plenty of times, show this data to the guy that did the work and he should know exactly why the scope is showing the cam out of phase with the crank, in fact show him a compression test as well and leak down test 😊

I changed the fuel pump module and run great now.

Good morning Ivan!

I loves this gentleman 🙏🙏🙏

Thans for the video Ivan.

You and your associates are absolute geniuses

I'll admit that it was difficult for me to follow along with the scope readings on this one.  Few people could ever have diagnosed what was wrong with this vehicle.  Can't wait for the conclusion.