As I said in my other thread, I still have a VE spike at about 1600rpm/40-60kpa where the VE wants to be >100. Surrounding cells are mid-80s.

Engine is a 87 454, basically stock. It has an aftermarket dual-plane intake and the exhaust is factory manifolds to dual 2.5" pipes that eventually merge into a single 3" through a muffler and full length exiting behind the rear tire. So really nothing should be creating these high numbers. Running stock 85lb injectors and aftermarket FPR with vacuum reference (15psi at idle, and it will crest 30 at WOT). I am running the later high-pressure pumps in both tanks. NV4500 manual trans. I did start with a 7.4/manual bin.

The spike used to be higher than the ECU could compensate for. I've made adjustments to the overall fuel calcs to try to bring the number down by increasing engine displacement (currently sitting at 496) and dropping the injector flow rate to 80. And also mechanical change by increasing the fuel pressure. This has gotten me to a point where at least the BLM isn't hitting its max if I keep things in that cell. But still, it has an occasional lean stumble right there. Currently the cells are at 99.

I have noticed that the majority of my VE is >50, with just a few high-40 values. With that, I think I have enough space to play with the fuel calcs even more and drop the overall values again, to try to get that high spike down to like 90.

I've checked fuel pressure and it is not losing pressure. EGR is non-existent and disabled in the code. Same with AIR. TBI base was rebuilt a few years ago with bushed shafts and there is no detectable vac leak there (and yes I checked at the VE spike).

So I guess this is really just a sanity check before I go in and drop my injector flow rate to like 75 and start tuning again. 95% of the time it runs fine...but that 5% is aggravating, especially if I'm trying to smoothly pull out with a trailer.