adjustable fuel pressure regulator

[Paulofolympia]

How do adjustable fuel pressure regulators operate? How are they controlled? Is there a brand/model or type that is recommended? Thanks.

[MikeFleming]

Usually there is an adjustable stop on the top side of the regulator spring. Just like an adjustable air pressure regulator.

[Paulofolympia]

all the reg.s I find are spec. for 5.0. Anyone know of one that is a direct bolt on for the 2.3 turbo. Paxton has one and it is spendy. What is a "vacuum/pressure port with 1:1 feature"? I want to order an adjustable regulator and don't know which to get.

[CraigB]

I had good luck with the Kirban I had. It was the same for the 1986-1993 5.0.

[Paulofolympia]

And that Kirban bolted into the stock reg position? Thanks.

[MikeFleming]

And that Kirban bolted into the stock reg position? Thanks. Yes. All rail-mounted Ford FPR's from 1984-1993 are the same.

Be sure to install a new gasket and o-ring.

[CraigB]

Like Mike said, bolts right on.

[Paulofolympia]

Is the fuel pressure static on the SVO? Does it vary between in boost and not? What controls this? Is stock fuel pressure for '86 appx. 39psi? Thx.

[MikeFleming]

Stock fuel pressure is 39 PSIG without the vac/pressure line connected (if the engine is running). That makes the delta pressure across the injectors a constant 39 PSIG no matter what the manifold pressure is. When manifold pressure is low such as under vacuum, the gauge pressure will go down accordingly; when manifold pressure is high - such as under boost - the gauge pressure will increase.

With a static FP of 39 PSIG and 15 PSIG of boost pressure, FP will be 54 on the gauge (aka gauge pressure).

[Paulofolympia]

When referring to the vac/press line not being connected (if the engine is running) which line is this?

[brsvo]

The one on the top of the regulator.

[Paulofolympia]

I ordered a Kirban FPR. Is the procedure for installing and adjusting it to bolt it in w/ new small rubber gasket and o-ring, then run the engine with the vac. line disconnected and adjust the nut on the FPR until the pressure gauge attached to the fuel rail valve reads 39 psi? Or something else? Where will it be out of the box? Thanks.

[MikeFleming]

Yes, correct. However it is not necessary to have the engine running, only the fuel pump(s). You cna jumper the pump(s) to run with ignition key in Run position and jumpering te EEC Test connector. Patrick previously posted a pic showing the Self-Test connectors to jump to engage the fuel pump(s).

[Ford Builder]

Is there a picture of the fuel pump regulator.

[Paulofolympia]

Will post pic when part arrives.

[Paulofolympia]

Here are some pic's of a new Kirban adj. fuel pressure regulator and the Bosch unit that I removed (I guess this was the stock FPR?). The new unit instructions say it is for a 302 or 351 and I am assuming it will work in my '86 SVO. Someone please correct me if I am wrong here? The instructions also say I have to remove the fuel rail; but I replaced the "original" already. It was a chore but I didn't remove the rail. The threaded screw coming out of the center of the new unit has an allen head in it and the nut around it is a lock nut. Apparently it is adjusted to the proper psi using this allen head and then locked into place. I also am assuming this FPR is both adjustable and variable; that it will increase psi as pressure is applied thru the vacuum hose. Any input appreciated.664566466647

[Ford Builder]

Paul if you don't mind me asking what kind of money is the reg worth ? And thanks for posting your pics.

[Paulofolympia]

I don't mind, I am planning to hang on to the Bosch FPR, and the adj Kirban was about $70. I suppose the stock, original is no longer available?

[rodster]

Great info....thanks for sharing and keeping us posted...