Most of it has to do with the computer box that comes with it. If that box wasn't hooked up or operating properly it would just be spraying nitrous only. They are VERY model specific.
HENRY


95 Contour, Custom EVO bodykit, 2.0l, PNP Focus head, Stage 2 cams, Je pistons, Eagle rods, 4in1header, 2.5" header back exhaust(complete stainless), D P nitrous, ram air intake, 10mm wires, flamethrower.