A new regulator could cost over $200 at the dealer and just the spring is over $50 at the parts store (not even available at most stores).

Many times a suspect bad FPR is simply just the spring. This spring holds firm fuel pressure at 50 psi. If it's much too low (under 10-15psi) the engine will not even idle smoothly much less perform under load. If you have low Fuel Pressure or if are not getting sufficient fuel pressure when you're under load, a Fuel Pressure increase will help. This means that the spring is fool proof in installation/removal and will be more resistant to radial (side to side flexing) motion which can cause the plunger to not seal properly leading to low fuel pressure. This means that there is not room for the spring to flex side to side (another cause for kinks). Even more importantly and by design this spring is a small amount shorter than the stock spring but with more strength. These springs are self centering (center themselves and actually fix onto the center detent of the pictured brass cap) this means that they will never get kinked in installation and will stay centered through millions of cycles. As the end result to you, investing in quality for your vehicle pays off in reliability for years of trouble free use. Smooth finish that is found on high precision springs avoids this problem.

A rough finish creates the beginnings of cracks almost like perforations. You will find a rough finish on cheap springs. The reason for a fine finish (polished) on a spring is that any rough casting leads to early spring failure. They are high precision polished springs. These are not a cheap off the shelf spring. Where other springs will weaken or even become brittle and shear, these specially designed springs will maintain their integrity.

This means that it will withstand the 200F plus temps of hot diesel coming out of the fuel rail and be able to handle the shock of that temperature all the way down to sub zero temps and the quick swing shortly after startup for years of service. If you've got low fuel pressure, this is the first and cheapest place to start! The Alloy of this spring is specially formulated to hold up to the extreme temperature swings of the fuel system. Fits ALL 1994.5 - 2003 7.3L Powerstroke Engines (All 7.3L engines including Old Body Style First Gens as well as Super Duties). This spring resides under the 3/4' Brass cap on the FPR (on the fuel filter bowl housing's side). These Powerstroke/InternationalF uelP ressureR egulators (FPR) are a very simple and durable design. Item: 301888047194 Ford Powerstroke Fuel Pressure Regulator Spring 7.3 FPR F250 F350 97 98 Diesel.

95 7.3 powerstroke fuel spring