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^^Definitely lean^^
Your ECU is #32? What is that? Isn't a redtop ECU 62, or was that a typo in the OP?
When you did the OEM rebuild, did you go to 86.5mm pistons; have any machine work done? OEM turbine & head gasket? Anything at all that would affect AFR's?
If you are losing fuel somewhere between the tank and the rail; adding fuel pressure will only exacerbate the problem. Best thing you can do is either set the FP to stock; or put on a stock regulator.
As far as adding a ground to your MAFS, perfectly fine. WS harnesses come with a chassis ground on the MAFS pigtail. I like the added security of knowing my MAFS ground is spot-on- and there is nothing ghetto about it.
Going back to the fuel pump... Do you have an aftermarket pump?
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