bastaad525, what model did you get., 2022 or 2025???? i believe the 2025 is for na cars turned to turbo and 2022 is for oem turbo cars, right? your car has the turbo block/head/injectors, right? if you bought the 2025, you'ld want to take out the spring on top of the fmu where the allen screw and lock nut is. don't use the spring. if you got the 2022 , it shouldn't come with it. the 2025 fmu came with this because it's for na cars turned to turbo cars. it's to add fuel b4 boost. .. i got the 2025 fmu and had to take out the spring on it after speeking to bell corkey (owner of bell tech). and i also don't use the restrictor
on the signal line. with fmu leaned out all the way w/ 35lb injectors, 31psi on fpr at idle, at fullboost i get 70 psi fuel pressure. if you z was bogging under boost, you were probably to rich. turn the adj knob all the way out and if you got the 2025 fmu, take out the spring or loosened the lock nut and back out the allen screw almost all the way out, then tightened up the locknut.