Hello my niece has a 2001 civic DX, someone poured sugar in the gas tank, I've changed the tank pump and want to change the fuel filter also,My wife's honda has it on the firewall and my ex wife's honda had it on the firewall, this one does not, I crawled under the car and all I can find is a canister about 8 in by 6 in oval shaped behind the gas tank with multiple lines and what looks like something with a diaphragm on the side, any advice? thanks