On my 1995 4.0 L OHV engine , looking from the front , it is about 2 inches to the right of the oil fill cap - I don't know if yours is the same .
Follow the rail line that runs to the injectors. You will find the pressure regulator.
The fuel pressure regulator is located on the fuel rail for the injectors. It should be right on top of the engine, and it will have a vacuum going to it. It is attached to the rail with two or three screws. Remember to relieve the fuel pressure first if you are planning on changing it.
You can find a water pressure regulator at most hardware stores or home improvement stores. It is typically located in the plumbing section.
Find out why it's running rich, fuel pressure regulator, air filter, etc....
pretty sure its in the alternator
it is above the altenater next to the fuel pressure regulator. it is above the altenater next to the fuel pressure regulator.
why can't i find a diagram of the fuel system for a 1991 ford explorer eddie baur
A water pressure regulator can be found in many of the common department stores. Costco, Walmart and Target are all options to find this for purchase.
The pressure regulator is located under the upper intake manifold. Find your fuel lines entering the manifold (right behind where the air enters the manifold)...the pressure regulator is on the bottom side of that cluster*%$. You will need to remove the upper manifold to reach it and change the regulator.
To adjust a water pressure regulator without a gauge, you can turn the adjustment screw clockwise to increase pressure or counterclockwise to decrease pressure. It may require some trial and error to find the right setting.
The alternators used in these vehicles have an internal regulator. The alternator is serviced as a complete unit and cannot be overhauled. Inside the alternator.
Ford Explorer 1991-2001 Under hood, drivers side in firewall