2017 Mustang gt Running Lean need help

[Burning Clutches]

Modifications:
Fic1000 injectors
Ess supercharger g2 with 110mm pulley
Lethal performance level 2 return fuel system

the car starts to lean out at about 4500rpm and I cannot figure why it’s happening. Also I have my regulator being boost referenced and set to 55psi base pressure.

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[mejohn50]

What's fuel pressure doing when this happens? How are you determining it's lean?

Also, have to ask the obligatory question...what has your tuner said about it?

 

[Burning Clutches]

The fuel pressure is stable at 55psi and my tuner sent me a picture of my fuel tables in all red

 

[horsepower addiction]

Ok your pressure should not remain stable at 55 there’s a boost reference for a reason. If you add 10 psi of boost you should get 10psi more fuel pressure. Have you logged fuel pressure and fuel pump duty cycle ?

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