No start on 17 Silverado after cam swap

[JASON11WS6]

Customer brought me a mess. They swapped the cam on a 17 Silverado 5.3. Truck wont' start. Just turns over. Check this scan out. MARINE.NOSTART.000.hpl

They said they filled it with E85 and set the tune to only run E. I talked them into a flex fuel sensor, I installed it and updated the ecm. Still nothing. The injector pulsewidth is crazy high and the high side pressure is low. I changed the highside with a pump I had laying around just in case. Nothing. I sprayed some starting fluid in the intake and it back fired right away.....
Pulled the front cover and with cylinder one up at tdc the cam is where it's supposed to be (or close enough to start). It may be off a tooth but it would still start if it was. Also, last time we had an LT car off a tooth we would read a 4 degree advance with the scanner.

So before I start ripping this cam out and changing parts that cost money, do you guys see anything in that scan causing a no start?

Thanks

[edcmat-l1]

This another one has way too many pids in the data.

Looks to me like it has no rail pressure. But if it backfires on spray, that sounds like it might be more than that even. Where does it backfire? In the intake or out the exhaust? Can you not run it at all on spray? If it were solely a fuel pressure issue, you should be able to make it start and run briefly on spray.

[JASON11WS6]

Too many pids is a thing? What's the downside?

When it backfired it sounds like the exhaust but once it did, I stopped trying and started taking apart the front end. The timing lines seem to like up but I wonder if the cam gear spun on the cam. I would think if that happened the car would bend all the valves. We do get compression through.

[edcmat-l1]

The downside of too many pids is it slows the scan rate down. And, it's a bunch of unnecessary crap you gotta weed through to get to the meat and potatoes.

For a no start on this you could narrow it down to a dozen pids, maybe less.

[GHuggins]

You've got a cam position sensor code and looks like possibly no rail pressure. The connectors going to hpfp and the rails are interchangeable. Usually you'll have other codes, but worth checking wire colors to make sure they're connected to the right connectors. Really sounds like something wasn't hooked back up right. Maybe even a ground off somewhere.

[ns158sl]

Id fix that code first but it sounds like Cam timing to me. Put it this way. Put a stock cal in it and see if it fires. That would be telltale mechanical issue.. for the most part.