![]() ![]() ![]() The photo to the left shows the location of the regulator in fuel bowl and the connection I used for my gauge. Over time debris in the fuel system can lodge between the rubber seal of the regulator piston and the spring maintaining the pressure can weaken causing inconsistent and low fuel pressures. Any debris in the fuel that has made it to the filter bowl either settles int he bottom of the bowl or must pass through the pressure regulator before returning to the tank. It is important to note that the fuel returning to the tank through the regulator is not filtered. Excess fuel is returned to the fuel tank through the fuel pressure regulator located on the fuel filter bowl. The fuel then passes through the filter to the rails and injectors. A couple of issues which effect the control and delivery of fuel pressure to the engine has to do with the design of the fuel system itself and how the fuel pressure is regulated.īasically the fuel is drawn from the tank by an electric fuel pump which pressurizes the fuel being delivered tot he filter housing on top of the engine. The basic Ford specification for fuel pressure is 45-65 psi. Unfortunately many trucks suffer from low or inconsistent fuel pressure which can cause a loss of power, EGT issues and excessive smoke. Fuel delivery pressure is critical for 1999-2003 Ford Powerstrokes with 7.3L engines for making power and operating efficiently.
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