Ranger 2WD V6-245 4.0L (1990)
Fuel Pressure Regulator: Service and Repair
Fuel Pressure Regulator
REMOVAL
1.
Release pressure from fuel system at fuel pressure relief valve (Schrader) on fuel rail assembly. To gain access to fuel pressure relief valve, valve
cap must first be removed.
2.
Remove vacuum line at pressure regulator.
3.
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 regulator insert a fuel line coupling key into the slots in the coupling.
d. Using the tool, pull the fitting from the regulator.
4.
Remove two retaining screws from regulator housing.
5.
Remove presure regulator assembly o-ring and washer. Discard washer and inspect o-ring for signs of cracks or deterioration.
6.
Inspect fuel return tube for kinks and abrasions.
INSTALLATION
1.
Install new washer and o-ring on regulator.
2.
Lubricate fuel pressure regulator o-ring with a light oil.
NOTE: Never use silicone grease. It will clog the injectors.
3.
Ensure surfaces of fuel pressure regulator and fuel injection manifold are clean.
4.
Install fuel pressure regulator on injector manifold. Tighten the retaining screws. Refer to SPECIFICATIONS.
5.
Install vacuum line to regulator.
6.
Install the fuel return line to the fuel presure regulator by pushing it onto the fuel pressure regulator line up to the shoulder on the regulator line.
CAUTION:
The connector should grip the regulator line securely.
Fuel Pressure Regulator
7.
Install the connector retainer and snap the two halves of the retainer together.
8.
Install the cap on the relief valve if removed.