If it is like the b2600i and b2200 it should be right behind the driver kick panel.
The fuel pump relay is located in the cab near the floor behind the driver side kick panel. The attached links below contain additional information about your truck.
The fuel pump is in the fuel tank Turn key on-Should have a fuel pressure of 64-85 psi
Inside the gas tank.
It's in the fuel tank. You have to get access to the top of the fuel tank
Fuel pump Mazda 626The way I did it was remove the back seat and there is a panel under the lining, unclip wires and loosen bolts!
If it is mechanical the diaphragm has a hole in it.
where is the fuel pump on a 89 Mazda b2200
It sounds like low fuel pressure could be a real possibility. It could be a partially blocked filter, weak fuel pump or a faulty fuel pressure regulator.
how to reset a fuel pump on a Mazda MPV van 2000
Where is fuel pump on a 1991 chev 1500?
The electric fuel pump is inside the fuel tank