Kirban Adjustable Fuel Pressure Regulator Install for Fox Body Mustangs

First things first.
I AM NOT RESPONSIBLE FOR ANYTHING WRITTEN HERE, YOUR CAR, OR YOUR MAMMA's CAR. IF YOUR DONT KNOW YOUR WAY AROUND CARS, TAKE IT TO A PROFESSIONAL OR SOMEONE WHO KNOWS WHAT THEY ARE DOING. WHEN WORKING AROUND FUEL ALWAYS TAKE THE NECESSARY PRECAUTIONS.

So you want to replace your fuel pressure regulator? Lets start off with the location of the stock one.

It's located right behind the opening of the intake manifold, to the right of the EGR valve.(See pics)

Now that you know where its located lets discuss what the kirban kit comes with and what else you might need for the install.

The regulator should come in a little plastic bag and include:
1 Regulator with rubber gasket around the nipple of the bottom side of the regulator.
1 set of instructions
3 allen head bolts.

What you might need in addition to this:
A fuel pressure guage to set the regulator.
A fitting to adapt the guage or fuel line to the schrader valve. (I used Autometer part #3275 for my mechanical guage, #3280 is for electronic guages)
Thread sealer of some kind (liquid or tape, although the tape leaked on me)

Next, heres a list of tools you will need:
An allen wrench to remove/install the 3 bolts on the regulator.
Misc. wrenches and such to gain access to the regulator.

OK, Now lets move on to the removal of the stock regulator.

1. First I like to unplug the fuel pump relay in the trunk or hatch of the mustang and then start the car. I let it run until it dies....this gets most of the fuel out of the lines you'll be working with.

2. Once thats done its time to start taking stuff off. Begin with the upper air intake hose to gain access to the throttle body. Next remove the vaccum line to the EGR and remove all the hoses, cables lines, etc. to the throttle body and EGR spager. If you have a strut tower brace, its ok to leave it on through out the install but you must remove the EGR valve before you remove the throttle body. Now remove the throttle body and EGR spacer.

3. Ok now your bay should look like this (except your regulator will be there)
Next up is removing the old regualtor. Its quite straight forward. Simply remove the threee allen head bolts using an allen head wrench of the appropiate size. Some people like to loosen/remove the fuel rails for better access, but its not a necessity. Once the bolts are undone just pull the old regulator off. Note: take care when removing the regulator, there may still be some fuel in the line and it could be pressurized. Once off, be sure not to allow dirt or other particles into the fuel line. This could lead to clogged fuel injectors.
Heres a close up of what the rail will look like when the regulator is removed

4. Now its time to install the Kirban unit. Installation is the reverse of removal. Simply push the regulator onto the fuel rail and make sure its seated. Next bolt it up using the supplied 3 bolts in the kit. Once installed it should look like this

5. The last step is to put back all the stuff you took off. The EGR valve, throttle body, vaccum lines, etc. all need to be put back the way you found them.

Now that everythings hooked back up, its time to hook up your guage and adjust the fuel pressure. Undo the shrader valve located near behind the alternator. Install the adapter fitting using ample thread sealer. It should look something like this

Then just screw your guage onto the fitting, again using thread sealer. Be careful not to over tighten the brass fitting. Brass is not very strong and you really dont want to break the fitting off in the fuel rail. (from experience)

Alright....almost done. Now that everythings hooked backed up, you need to test for leaks. Simply turn the key in the on posistion a few times and return to the engien bay for leaks. You should see 20-60 psi on the fuel guage depening on how many times you turned the key. It will slowly fall til it reaches 5-15 psi. Check the car thougholy for leaks and fix any you find. Once your certain there are no leaks, start the car.

Adjusting the fuel pressure:
Loosen the locking nut on the top of the regulator.
RIGHT will increase pressure
LEFT will decrease pressure
Set the pressure with the vaccum line off on top of the regulator. When the vaccum line is plugged back on pressure will usually drop 7-9 psi.
What pressure should you set it at?

On a car thats mostly bolt on and doesnt require extra fuel flow, usually 38-40 psi is a good number.
On highly modified cars, it varies from car to car depening on the modifications, injectors, and such.

Now your finished and you can adjust your fuel pressure as needed.