rb25 air/fuel problem

[ForceFed240]

So i picked up a s14 that had already had the rb25det swapped in but it runs like poop so i was hoping you guys could possibly give me some insight on what could be the problem.

It idles right around 14.7 when I hit the gas the air/fuel guage gets over 17/1 and then drops down to around 10/1 a few secounds after and runs super shitty. Ive checked all the vacuum lines and change almost every hose just to make sure, cleaned the maf and changed plugs and checked the coil packs.

Any one have any suggestions on what this could be? how to fix it?

mods are
aem uego wideband
aem tru boost controller
freddy intake manifold with a big throttle body
large fmic
walboro pump