Where is the fuel pressure regulator located in 97 g.m.c. safari van 4.3 liter located

If you have throttle-body fuel injection, you don't have a fuel rail. The fuel pressure regulator should be mounted to throttle body.

Fuel pressure= 55-60 psi

The fuel pressure regulator is rarely a separate item and is usually to be found mounted at the end of the fuel rail and the fuel return line and a vacuum line is connected to it.

The fuel pressure regulator on that Vortec engine is under the upper intake plenum, on the back side of the central fuel injector. It is held on with a slide clip.

The intake manifold plenum must be removed to service the fuel pressure regulator on the 3.5L engine...



Fig. 4: The fuel pressure regulator is located in the rear of the fuel rail on the right side (click image for zoom)

Fig. 5: Carefully pry the regulator from the fuel rail

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There is not really a fuel pressure sensor. There is a fuel pressure regulator. The fuel pump pumps up pressure and the pressure regulator allows the fuel to return to the fuel tank if the pressure reaches 37psi in the 4.6 liter. It is located on the intake manifold. It is round about 3 inches in diameter, and has a fuel line on both sides of it.

Replace the FUEL PUMP RELAY. Its located in the under hood relay center. This relay primes the pump with the key on, about 2 seconds, then the pump will not run until the engine has oil pressure, then the fuel pump is energized.

replace the fuel pressure regulator and the fuel filter, the pressure is low.

you will have to remove the upper intake to get to the regulator.