Two Separate issues, Hoping to get some help.
Vehicle Details
2008 Silverado
Originally a 4.8 Truck, Several years ago was swapped to 5.3, Tech 2 loaded proper stock ECM calibration.
2.6L Kenne Bell
3/4" Thick Phenolic Spacers
LS9 Injectors
Newly installed BTR PDS Stage 2 Cam (227/242 .612/.592 122+6)
Went to 2BAR OS recently. (To gain boost enrichment)
ISSUE 1:
Prior to cam swap (and still there after), he would tell me if he eased off immediately after a cold start it would struggle and die. This screen shot was from the only time i've been able to replicate it, but on a cold start, if you get this truck into the boost (super easy to do), there is apparently a multiplier somewhere that creates huge duty cycles. Has anyone ever seen something similar to give me an idea where to look for this? If the truck runs 30 seconds before you pull off, it doesn't happen.
Duty Cycle.jpg
ISSUE 2: (UPDATE: THIS IS MOSTLY RESOLVED, PRIMARILY CONCERNED WITH ISSUE 1 NOW)
I've gone in a bunch of circles on this one. The truck goes very lean on almost every take off for 1-2 seconds. Drivability wise, it creates a minor hesitation when you touch the throttle.
I've tried to turn the transients up, and I end up getting it super rich on other transitions without solving this one. I abused the area of the VE table that is hit on take off to make it way to rich with no real change. (it's put back to normal in attached file)
I've dialed in the VE tables (3500 and under) and MAF within reason.
I'm not sure if the combination of the angled LS9 injector spray and the phenolic spacer is putting a ton of fuel on the walls and has the transients super freaked out, or if that's not related.
I've not adjusted EOIT for this cam because it does not have any overlap, but I'm not opposed to trying it, if it's a possible cause. Anybody have some direction on EOIT with no overlap and a maxed injector?
The log attached is from tuning VE, the maf was failed at the time, the first several minutes are sitting in the mcd's drive through, lol, but there are a few take offs in it. The tune attached is the current revision with MAF failed, no promises it doesn't have any crazy things i've tried to fix this still in it.