Islander

I recently overhauled my cylinder head and changed my piston rings on my H22A1. I'm using RC 370cc injectors and using the stock ECU with the EFI System PMS Kit. My car is turbocharged. I'm getting a hesitation and sometimes the car bogs according to how hard I get on the gas while moving off. I've kept my rpms below 3500rpm thus far. I haven't put 100miles on it yet. Whenever I get the above problem my air/fuel ratio meter goes lean and then bumps back up when it smooths out. What could be causing this? I'm wondering if it's not the PMS Kit causing this. Any suggestions?