A friend of mine let me have this cause he totalled his car it's a KnightSports FBCD it has stickered for 89 and up what is the difference from this one and a regular FCD from some other company! It has on the sticker fuel cut and boost control device! Does this FCD have a specific boost level or something and is there a way I can check with the multi meter if I pump pressure in the boost signal to see if this unit works by reading it's voltage! Just wanna make sure it works before I blow up my car! Once I put the downpipe on!