[Formulajones]

One thing about these EFI units when fuel pressure issues arise, you can't really tell just by the afr gauge.
These systems will compensate for a weak fuel pump and continue to add more fuel to meet your target afr. You need to look at a datalog to see it. Or look in the tune. You'll see things like the learn table going nuts in the wot areas adding a ton of fuel and it will continue to add fuel up to where ever you have your compensation limits set. Once you reach that threshold it will stop adding fuel and if it's not enough then of course the nose over sensation or lack of rpm.
These EFI units are good at masking fuel issues depending on how you have the tune set up