I just bought a 95 GT that used to have a powerdine supercharger. The FMU is still in place but they have it spliced into the vacuum live between the intake and the fuel pressure regulator. Is this o.k. or should I just cap it off???? The return line has been cut and modified for it so I cant just take it out unless I go buy a new return line. I have been getting pretty bad gas milage with it ( about 10 mpg), could this be the cause? any advise would be appreciated. thanks.