if you drop the fuel tank from the mounts it is on the top of the tank. there are 6 screws that you have to remove and the entire fuel pump module will come out. there are two electrical connections that you have to disconnect as well. one is outside the tank (if you follow the wires back toward the cab you will see it), and the other is inside the fuel tank.
The 1998 Nissan Frontier is sequential electronic fuel injected (SEFI). I can think of no vehicle made since 1992 that was not fuel injected.
On a 1998 Nissan Frontier there are usually two different fuel injectors. On other makes and models of vehicles, this may vary.
Mounted on top and inside the fuel tank.
my 1998 frontier has about a 13.5 tank, I have never ran it out of gas though. It's range seems to be around 330 miles
the filter is on the frame rail and there is a special tool to release it
The 2014 Nissan Frontier runs on regular unleaded.
The 2009 Nissan Frontier runs on regular unleaded.
The 2005 Nissan Frontier runs on regular unleaded.
The 2011 Nissan Frontier runs on regular unleaded.
The 2008 Nissan Frontier runs on regular unleaded.
The 2013 Nissan Frontier runs on regular unleaded.
The 2006 Nissan Frontier runs on regular unleaded.