Fuel Pressure Regulator: Service and Repair

Removal

1. If removing fuel pressure regulator while fuel injection supply manifold is installed on engine, release pressure from fuel system prior to performing any repairs: Fuel Pressure Release

2. Remove vacuum line at fuel pressure regulator.

3. On Aerostar, disconnect the fuel return line from the fuel pressure regulator as follows:

a. Disengage the locking tabs on the connector retainer and separate the retainer halves.

b. Inspect the visible internal portion of the fitting for dirt accumulation. Clean the fitting before disassembly.






c. To disengage the fitting from the fuel pressure regulator, insert the fingers on Fuel Line Coupling Tool T90T-9550-A into the slots in the coupling.

d. Using the tool, pull the fitting from the fuel pressure regulator.

NOTE: If the fitting has been properly disengaged, the fitting should slide off the regulator with minimum effort.

5. Remove two retaining screws from fuel pressure regulator housing.

6. Remove fuel pressure regulator O-ring and washer. Discard washer and inspect O-ring for signs of cracks or deterioration.

7. Inspect fuel return tube for kinks and abrasions.

Installation

1. Install new washer and O-ring on fuel pressure regulator.

NOTE: Never use silicone grease. It will clog the fuel injectors .

2. Lubricate fuel pressure regulator O-ring with light oil ESF-M6C2-A or equivalent.

3. Make sure surfaces of fuel pressure regulator and fuel injection supply manifold are clean.

4. Install fuel pressure regulator on fuel injection supply manifold. Tighten two retaining screws to 8-11 Nm (70-97 lb.in.).

5. Install vacuum line to fuel pressure regulator.

6. Install the fuel return line to the fuel pressure regulator on Aerostar by pushing it onto the fuel pressure regulator line up to the shoulder on the regulator line.






CAUTION: On Aerostar, the connector should grip the regulator line securely.

7. Install the connector retainer and snap the two halves of the retainer together.