L83 Won't Start after DOD Delete

[gofast321]

Hi everyone. I need some help. I have a 2015 L83 (gen v) swapped into my 1988 Suburban. The swap has worked great for the past 3 years (I dive it everyday). A few weeks ago I had a DOD/AFM lifter fail. I decided to replace the cam and lifters and install DOD plugs in the block. I reassembled everything today but now the truck will crank but not start. It doesn't even sound like it wants to try to start.

- Timing looks right. Crank dot at 12 o'clock and cam arrow at 6 o'clock
- Engine is getting fuel (plugs are wet)
- Engine is getting spark (pulled a plug and cranked the engine and could see spark)

Strangely there seems to be a lot of air blowing out of the intake manifold. Almost feels like timing is out 180 but I don't think thats possible on one of these engines correct?

I already had the DOD deactivated in the ECU when I originally did the swap? Would there be additional ECU tuning required?

Any guidance or help would be appreciated. I'm all out of ideas.


Thanks in advance.


Chad