Chasing a lean spike I get at WOT followed by knocks ("84 Crossfire Vette, 383 Stroker, Renegade, 80# Inj, VRFPR @ 28psi, EBL ECM,). Nothing I do seems to have any affect on the spike which occurs momentarily from a standing stop WOT action. In fact increasing AE time and strength has a negative impact on 0 to 60 times and added a second lean spike shortly after AFR enriching, go figure. Anyway, I noted the injector duty cycle % are 50% or less during the initial leaning out event. Duty cycle increases rapidly there after and AFR's shoot up from 16:1 to ~10.5:1. Thinking I've got to those injectors working harder at the initial moment of WOT- right? How do I do that? BPC values? VE tables? __ ? Have jacked VE's that also seems to have a negative impact on performance. BTW overall I have it running rich and am reluctant to drop it because of the knocking... Graph - (Before AE jacking)

 

Hmmm, no ideas? Well looking at the spike it appears momentarily to start enriching then leans out fast. Told it's the thirsty Renegade surface area which requires a good shot of petrol at the lower KPAs and that makes it an AE fixable issue. Tried that and it resulted in poorer performance and no improvement in the leaning. . Below is spreadsheet that illustrates the values I'm playing with. The "USE" column represents the attempted BIN value fix while the "Gold" column represents the baseline. Green highlights, I believe, are the operating areas where things go bad. So, just soliciting some advice from anyone who has been down this road before. Also wondering if my vacuum referenced fuel pressure regulator is contributing like in not reacting fast enough. Maybe I should try running it without the vacuum function. Jump in, cuz I'm running out of things to try... Thanks.

 

At member suggestion - Reposted to DFI & ECM