ok so i recently just put a new.exhaust.on my.94 accord(custom piping to 4") about week ago and lately ive come to notice my gas is is.wasting faster(or by what the.needle.says) i know the gas sending unit needs to be replaced but even before i put the.exhaust my gas(or what the needle read) still read kind of normal.now i put 15.dollars worth goes a quarter than drops back down any.ideas thanks.