2016 Camaro SS M6: TSP LTs with no cat x, MSD intake, 103 TB, Rotofab dry, flex fuel sensor
I'm mainly just tweaking small things here while learning gen V tuning. Thought I'd mess around with idle and part throttle driving for now.
Dialed in idle areas of MAF and VVE using WB error, then smoothed into existing values prior to this drive. Most of the drive was uneventful and on dash WB looked good during the drive. First time I noticed something amiss was at a stop near the end of the drive. After exiting DFCO, WB stayed
WAY lean at idle and kept trending more lean. Tried applying a little throttle and WB moved back toward the rich direction hoping to prevent any damage. No issue as long as the car was under throttle. Got it home and started looking through the log.
I see lots of areas where LT and ST trims keep trending leaner then return to near zero. Apparently the ECM was able to add enough fuel during those events that the WB showed everything was in check... until it couldn't keep up and it wasn't. Any suggestions on what would cause trims to skew like they did, especially when the car returns to idle?
Before VVE:
vve_before.jpg
After VVE showing how little was changed:
vve_after.jpg
MAF deltas:
maf_delta.jpg
Tune and log:
final.hpt
test_drive_shortest.hpl