urgent! car backfiring threw inlet manifold?! :o

[kcpwns]

hey guys just tryin to figure out whats wrong with my girlfriends vt...we just replaced fuel filter and that fixed the stallin problem...
now it idles fine in park but as soonn as you try and rev it it starts backfiring threw the air box :/
help anyone?

[kcpwns]

hey guys all good i fixed the problem
turns out the fuel pump was busted...so there wasnt enough fuel gettin pumped into the engine to keep up with air intake and all that