before anyone starts bashing, i've done the research and i've looked at various threads about this topic, but i keep coming up with mixed answers and such. the fuel sending unit, is it inside the tank? my back half section has already been gutted out and i can see the pump and such. is that just the fuel sensor on top and the sending unit in the tank? also this is the part# for the fuel sending unit or is this the fuel sensor? 37800-SH3-004

i have a 91 crx si with a b18a swap, wanting to know because im having some gauge issues with my car, by that i mean when the tank is on half it drains a lot faster and i would like to get that fixed.