I'm a f@cking moron. Had the cold side pulled apart to replace my HFPF and also pulled out my Radium FPD (blown gasket). Btw, that totally sucks because it pukes fuel out the boost reference nipple. With it hidden under the intake manifold, you don't see it, rather, you smell it. Nice. I put the hardline back in and replaced the LPFS with the updated silver Bosch. In all my wisdom of re-routing my wires for a cleaner engine bay, did not fully depress (click) in the o2 plug (gray wire/wideband/bank 2). It was partially plugged. Idiot.