Drop in Cyl Airmass - Lean Spike E38 VVE tuning

[bgreen]

Hi all,

Trying to see if there are any of you that have had this issue.

I am tuning VVE. I get a large drop in cyl airmass which leans me out. It has happened under partial throttle and WOT.

LS3 C6 that is running e38 ecu - just headers and catless xpipe.

Drop Chart.png

On this particular log, cyl airmass goes from .85 to .42 and then back to .85.

MAF IS FAILED.

I did notice while poking around there is a SD Air Patch. The description is a bit vague. Would this help me?

I have tried multiple VVE Tables now, changing my boundries back to stock, etc. I do have a great tuner helping me but figured I would post here as well since I come here for a lot of my questions.

Will update here if we find anything off the forums so hopefully we can help someone else down the line..

Below is the tune.

Step 9 - Step 7 Map Original Zones.hpt

[lukearmstrong1990]

disable injector de soot switch

disable fast tq exit and max the values

set dynamic disable and re enable to 8000rpm under airflow dynamic

[lukearmstrong1990]

if u want SD apply the custom OS, so much better IMO

[bgreen]

Appreciate the help.

The tuner helping me through this did note that 8000rpm change as well. That seems to have cured my issue and I have the VVE pretty close now.

Any more info on that desoot? Is that something I should do anyways? Will I need to go back in and tune the VVE again?