I've mostly got the VE tables dialed in an starting to work on the MAF but the whole time I've struggled with lean conditions after startup at pretty much any temp. When the truck is warmed up it seems to last about 45 seconds but when it's cold it doesn't seem to clear up until the ECT gets over 150.
I've played with the OLFA tables in those ranges but it doesn't seem to help. I thought maybe it was the afterstart enrich tables but adding to them doesn't seem to help either. It's almost like they're pulling in fuel instead of adding it.
But looking at the log, it's commanding richer than stoich but the WB is super lean. It's an AEM 30-0300. I've used this same sensor (new sensor but same setup) in my car, so I trust it. The placement of the sensor isn't ideal. It's in the center of the crossover pipe between the longtubes. It's a speed engineering kit for an 01 RCSB chevy. So it's farther away and possibly not getting the best airflow until I'm on the throttle. But the truck still runs rough when it's showing this lean so I think it's reading fairly accurately.
I thought about messing with the complex bias but this is the 12216125 OS so I think it should be ok.
My other big issue is transients when letting off the throttle, it goes super rich. I know some of that will change when I turn DFCO back on but I'm not used to seeing this much swing. Any suggestions on that or the lean condition?
Truck is an 01 Chevy, 5.7, Truck Norris cam, 4L80 swap, 80lb siemens, DW400 with external FPR set at 58 psi, long tubes and 3" exhaust.
Here's the latest log and tune.
Now MAF ONLY - Best so far Test 6 perfect shifts in test 5, raised shift RPM, played with TC loc.hpt
23-08-10 21-38-21.hpl