X-90 engine bogging under acceleration

[Ken H]

Hope I can get some help here. I know this is a Sidekick/Tracker forum, I have a 97 Geo Tracker and go here often for it, but my problem is with a 96 Suzuki X-90, 16v. The X-90 was running fine, then boom, acceleration issue, she can't get out of her own way, Boggs down when accelerator is push. Sometimes she will recover, other times she almost stalls. Car starts easy, idles ok, check engine light on. Pulled codes with Actron scanner, P0135 (O2 sensor heater bank 1), P0400 (Exhaust gas rec flow). Looked through kick fix pages for recommendations. Came to the conclusion issue is fuel delivery. Did pressure test with HF gauge at the fuel filter. 40 pounds with key on. 42 pounds with engine running. Can't find anything about what that means on the fix kick, so I thought I would try here. I have already changed the fuel filter.
Any help would greatly be appreciated. New to this posting thing.