MAF MAF steady state lean out.hplVVE low rpm lean.hplmiss3.hpl
I have an issue with a PD supercharged LS3 and a persistent lean that occurs at high load from low rpm, typically 1500 rpm or lower, I can replicate it on the dyno or on road, the rate of acceleration needs to be slow or even at a static speed. if you go WOT the mixture is good as the 02 sensors shown, after a second or so the car hesitates and the mixture goes lean, if not accelerating it stays lean, if accelerating it does return to rich.
The commanded fuel, airflow, volumetric efficiency even injector pulse do not alter. I have seen this on a number of occasions with different cars, autos will kick down and its not noticed but this is a manual and he drives around in 6th so its an issue.
I have tried tuning in an SD updated OS also in VVE and then also with a MAF/VVE like stock. I haven't attached a tune as I have 3 different versions. It occurs after the transients would stop, a good second after the pedal has stopped, I think it could be related to the predicted coefficients which I zero in modified cars.
Any ideas welcome.