I'm working on transient fueling to remove lean spikes on throttle entry and throttle exit on my 2001 Silverado 6L with 76mm turbo running on a 2002 Tahoe flux fuel tune. I'm running a MAF tune since the truck drives much better with the MAF. For those that are curious, I'm using a scaled tune and LS7 MAF. I confirmed the issue is similar in the unscaled tune. Anyway, I'm modifying the Wall Impact Factor vs airflow table and it's getting better (larger numbers in low airflow areas and blend to stock numbers in higher airflow areas). Question is how do I tell what part of that table the ECU is using? During a throttle transient you have a range of airflows. Also, I would like a way in the scanner to tell if the ECU is in steady state or transient mode and I can't figure out what to log to tell. Does fuel trim cell change? The closed loop flag? There is also a fuel system status, do any of these indicate the ECU is in transient fuel mode?
Blind squirrel method of looking at the log as guessing which airflow it's using is getting me closer. But as I get close, I will need a better, more scientific method. Thanks.