Also have you played with commanded spark advance at these low loads? When I had an AP, I did a cross country drive with lean afr at cruise RPM/Load and was getting better gas mileage than my wife's Ford Fusion (4 cylinder) and consistently getting over 30 mpg when filling up. Yes I did. However af...

The load limit force spark retard table dictates when the ECU should start using the Overload tables instead of the open loop tables and has nothing to do with the AFRs going lean past some load, unless of course the overload tables have really lean target AFRs and the limits in the force spark ret...

You don't seem to be having that load cap issue I've read about a few times here where they'll shoot for a load higher than 2.2 or so and they have to overshoot to hit it while fighting the AFR's going lean. I just had this problem myself, and I was able to solve it. Operating Load Limit 1/2 (and I...

Also keep in mind these are ECUs designed in the early 2000's, while the LS platform kept going on the marked even to this date. Absolutely. I was referring to our ECUs having logic that aren't as clear/exposed, whereas even the 1999 GM ECUs were fully unlockable and accessible, albeit less feature...

mituc wrote: ↑November 17th, 2021, 9:53 pm Also remember we're basically changing the calibration tables, the actual/original ECU logic is not altered.

Quite a shame, especially when compared to ECUs from other manufacturers (for example, LS engine ECUs from General Motors. How I wish we could toggle the MAF and run speed density!).