I got a problem, with my jeep cherokee laredo. ??

On my jeep cherokee laredo. I need help finding the
problem on my jeep, there's no power going to the
fuel pump when I hook the pump wire directly to
the battery it works. And there's no spark I change
the distributor shaft and the coil n I change the
cam shafts censor. Still same problem. When I
bought it it ran good for 2 weeks, and then I
smelled gas in the jeep so I brought it home shut it
off didn't want to start just kept rotating  wouldn't
start and this happen in July last year, and I am still
working on it.  Do u have any
suggestionsuggestions? ???  It's 4.0 litre 4×4 four
door