is there a way to find out if your fmu is bad. i opened it up and it looks good it wasnt dirty in there. but my car seems to run lean i also have a inline pump

 

what ratio FMU are you running, how much boost, which injectors, what turbo kit, do you have a FPR gauge?

 

12:1 fmu, drag kit on a d16z6 with 5lbs, stock injectors, msd ignition with plugs gapped to .032, and stock fpr. any opinions on why i am running lean

 

are you positive the inline fuel pump is even working? just fyi, i had the same setup and at 5psi w/o the inline i leaned out. it was fine at 4psi though. i ran 10-12psi w/ a 12:1 fmu and inline pump w/o leaning out.

 

is your inline pump working properly?

It's possible that the fmu got stuck, it's been known to happen. I'm not sure how you can check it w/ out a fpr gauge though.


I ran rich up to 10psi on my old DRAG set up.