Well here it goes, i bought a 1994 SC 5 spd 106,000k, its in good condition it seems. I havent done nothing to it since i bought it, but here is my problem; i know for a fact that my fuel pump is making a hummmming noise (needs replacing) i'll go with the 255lph. I was wondering, will this cause power loss at high boost? im smashing through first, second and third gears and the cars boost at about 12-14psi, rpms's high but the car is hardly moving, i thinking that my cats are either clogged or there is something holding the power and not letting go, any suggs. The guy who had it put a new air filter and fuel filter. Id appreciate any feedback. Thanks.