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Working from mobile and will upload tune and log later. My 2011 Sierra 6.2, D1SC- goes pig rich into boost, as in breaking .5-1 PSI. Wideband goes to 8.XX to 9.2, and then comes into commanded, and will go pig rich again.
I had the opposite problem before doing the speed density patch and changing supercharger to "fitted" where it was leaning out as I was building boost.
Log ("funky afr") and tune attached. As an experiment, I went to supercharger "not fitted" but retained speed density patch and went back to stock fuel pump values vs the CTSV values I had in the tune. Didn't make a whole lot of difference. The pull before (long, uphill interstate on ramp) I was able to keep it around .5-1 psi on my gauge and the wideband read 8.12-9.52 the entire pull, but didn't get my laptop up in time to log. I did pull a snippet from a log the other day, "another pull".
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Truck is a mild forged piston build. 6.2L with D1SC/3.7" pulley, ID1000 injectors, Comp VVT Cam 210/224 with 114 LSA, Speed engineering 1 3/4 LT's/ORY into MBRP 3.5" exhaust.
Be warned... I've had issues enabling "supercharger fitted"
It will develop a random huge hiccup that looks like a bug in the ECM or something. Airflow and timing have a random huge spike like the VVE error issue.
Appreciate the insight, Alvin. Since disabling "supercharger fitted" it has gotten MUCH better over the last few revisions so now it's more when I go from cruising to standing on it initially, and getting into higher HZ that I haven't tuned but added airflow to make it rich when I sneak up on them.
In your experience, is it a 'double dipping' bug when both the SD patch and SC fitted are enabled, or just doing SC Fitted period?
Interestingly, with my stock injectors I had no issues pre-rebuild. With the ID's, it was going lean as I built more boost until I did the SD patch.