how do you know if its set tot 10:1 after using the mbc?
or are you just testing with a wb?

Probably you can use a fuel pressure gauge inside the car

thats sucks u have a neon i love hondas OBD1 all the way

whats an fmu? or an mbc?

fuel management unit, and manual boost controller. dunno if there's an FAQ around here, but the FMU is normally a kind of fuel pressure regulator that increases fuel pressure in relation to boost (intake pressure above atmospheric pressure), i.e. a 1:1 FMU (which would basically be any vacuum-referenced fuel pressure regulator (FPR, VRFPR) would increase fuel pressure 1 psi for each 1 psi of boost, and decrease 1 psi for each 1 psi of vacuum. An MBC, when connected between an intake manifold vacuum source and the turbo's wastegate, allows you to block any vac/boost signal to it, in other words allows you to actively set the boost at which the signal is allowed to pass through, in order to open the wastegate.

hth ;)
janus

Im back