Lean Condition During PE? E67 CTSV

[CCTBSS]

I am observing a lean condition 1.5-2 seconds into PE. It is pretty dang consistent. Commanded PE values change between 2500-2700 rpms right after entering PE. I am going to try and kill prediction coefficients and also increase manifold volume by 10% (Increase from factory 13.45L to 14.85L) and see if it goes away? I was wondering if I should try anything different based on others experience with similar issues. I also considered trying to command the same PE values across all RPM breakpoints in PE table to see if the condition goes away, but it looks like its some kind of influence with changing loads and transient conditions? Commanded doesn't match actual? However, if I nail it and move into the constant 11.46 commanded PE RPM cells that commanded matches actual with ~ 2% error.....

V2 CTSV with ported blower, snout, and Mamo ported LS7 TB
ID1000 injectors
All the cooling mods
2.38 pulley making ~ 14.5 psi boost.

Curious to here what others thoughts are? I will report back if the increased manifold volume and killing the prediction coefficients helps out any...

[Ben C]

Seems like this, fix at the end
https://www.hptuners.com/forum/showt...-we-solve-this

[GHuggins]

Yes disable desoot mode. Zeroing prediction coefficients will help if you still have some issues too...

Forgot E67's in boosted applications already come disabled... Did the prediction coefficients or manifold volume change anything? Your VE also looks like it needs to be dialed in...

[GHuggins]

According to what little data I got out of the log you posted - your VE table is very lean right where it's shifting gears and showing lean in the logs - that was just going off of a cylinder airmass back calculation... SO, start by tuning in the VE table as it directly controls transient fueling conditions like this and go from there...