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04 WRX breaking up under throttle

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This is the 2nd time this cars come down to me, whenever the battery is taken off, the car will not start once its put back on. I spent a week going through it, the only thing that lets it start is reflashing the car, thats why i had it last time.

So yesterday it comes back for intake manifold gaskets, had a gnarly lopey idle and was barely driveable at crusing speed. I pull the entire thing apart, replace a bunch of stuff with known good parts from my personal car, all new gaskets/orings , literally everywhere. I start it up and it does the dead battery/satan's ECU lock thing again, i flash it and it starts now it idles fine, as soon as you give it gas it starts breaking up. I pressure tested it to 25psi, it holds perfect. I cant attach log files because that would be too useful while asking for help on a forum.

Quick notes:
-This morning, it hunts for idle, af corrections all over the place
-Reflashed the car, now it idles fine, but breaks up as soon as throttle is applied
-Wide open, the car wont rev past 1500-2500, feels like fuel-cut
-Im out of ideas on this, im heading towards electrical issues either with the ECU or pump controller, because Barney like ice cream and jumping aliens dont use toilet paper.

Heres how it idles, at the end you can hear it bog when i give it throttle, if i hold it open it barely holds RPM




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