Severe hesitation/stuttering when full throttling or doing heavy pulls. Believe this is a lpfp issue, HPFP is brand new from FCP Euro, new sparkplugs, new coilpacks, 0 misfires, good injectors, injector seals, decouplers, brand new fuel regulator, new lpf sensor, fuel rail sensor, tmap sensor, boost solenoids, vaccuum lines, turbo seals, and much more. i have been through 6 injectors, 6 used hpfps, and finally a brand new one from fcp euro and i still cant get the pulls i use to get. codes i typically have gotten is "Fuel rail pressure related", fuel pump plausibility, and it keeps sometimes throwing cylinder injection cutouts in the past but now doesnt do it as much since ive gotten this new hpFP. LPFP drops badly in psi at the high rpms range.