When driving with the stock ecu, I have noticed that when lifting after accelerating, it goes very lean 22afr, yet always manages to have enough fuel on next acceleration.

With the megasquirt, I see almost the opposite, when lifting, it goes a bit rich.

How can I get this behaviour with the MS? Can someone explain what the stock ecu is doing?

 

tune your accel enrichments and make sure overrun fuel cut is on and tuned properly

 

Thanks