I'm tuning a 2013 Sierra Extended cab 4x4
5.3L 6L80E
BTR Stage 2 truck cam
DOD & VVT Delete
1-7/8" Long Tube Headers
Catless Y-Pipe
S&B CAI
I started by adding some idle airflow and idle RPM to make sure the truck idles well enough to tune.
I also removed codes for DOD, VVT and cats as well as zero variable cam spark tables.
I reduced shift times, increased base shift pressure under light throttle and increased oncoming shift pressure slightly to get it shifting a little faster while also setting up the shift tables for the tire size and better driveability using the Bluecat tool.
I then started tuning the VVE. I unplugged the yellow MAF wire while still leaving the rest plugged in, unplugged the O2 sensors and hopefully changed the tune to run on VVE only.
I then set up an AFR500 wideband for Lambda with a graph in the scanner to report error vs. EQ Ratio while filtering out deceleration, no throttle, idle and coolant temps less than 176F. I tuned VVE in idle first before adding the idle filter.
I keep getting a lean column when logging around 1800 RPM and 2600 RPM no matter what I do it still logs lean.
I use the following filter in my graph.
([6310]<6 OR ([6310]>7 AND [6310]<14)) AND [50010.242]>176 AND [50030.91]>35
I was hoping someone could look at my tune and make sure I'm heading in the right direction and maybe help me figure out what could cause the lean ridges I keep logging or do I just need to keep going? It just looks like calculating coefficients fights me a some too.
My logs are usually over 1.5 hours now because I'm trying to get as much steady data as I can get to get it all dialed in.
Any help is appreciated.