Aerostar V6-183 3.0L (1986)
Fuel Pressure Release: Service and Repair
CAUTION: Fuel supply lines on EFI engines will remain pressurized for some period of time after the engine is shut oft. This pressure must be
relieved before servicing of the fuel system is begun.
FUEL SYSTEM PRESSURE RELIEF FOR EFI ENGINES
NOTE: The 2.3L EFI engine is equipped with a fuel pressure relief valve in the fuel supply manifold compartment.
Before opening the fuel system on vehicles with EFI engines, relieve fuel pressure as follows:
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Remove fuel tank cap.
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Disconnect vacuum hose from fuel pressure regulator located on the engine fuel rail.
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Using a hand vacuum pump, apply approximately 84.2 kPa (25 in-Hg) pressure to the pressure regulator.
Fuel pressure will be released into the fuel tank through the fuel return hose.
