#85472, "Has anyone's SFMU ever gone bad?? if not then whats wrong??"
alright...heres my situation....my car has never been working the way it should be.... its always had a rough miss and never takes off like it should...everything has been weeded out except my fuel system... first of all, i cant get my fuel pressure lower than 23-25ish...second, my fuel pressure doesnt rise like it should... my sfmu came with two springs, one short, one long...not green or colored crap...im using the short one and 2.72 disk with 30# accel and warbro 255 pump... it would every now and then work great, but now that i installed the fuel pressure gauge and i have both autometer a/f gauge and digital that shows im running lean as hell, i know its fuel... fuel pressure slowly rises to around 50ish, but thats after ive been boosting for 3000 rpms... so whats up?? i really dont think its my fuel pump because when i pinch the return line, the fuel pressure jumps up to 100 quickly....so i really think its my sfmu....do they go bad?? THE DIAPHRAM AND VACUUM HOSES ARE GOOD!!!! IVE CHECKED THEM OVER AND OVER...thanks doug
14b custom turbo kit, modified starion front mount, 9.6:1 JE pistons/Eagle rods....running 12psi screw flanders