Part 3 of 3

FUEL SYSTEM PRESSURE RELIEF PROCEDURE
Engines With Fuel Pressure Connection (Must Be Performed Before Disconnecting Fuel Line Fittings).

CAUTION:

^ To reduce the risk of fire and personal injury, it is necessary to relieve fuel system pressure before disconnecting fuel line fittings.

^ After relieving system pressure, a small amount of fuel may be released when disconnecting fuel line fittings. In order to reduce the chance of personal injury, cover fuel line fittings with a shop towel before disconnecting, to catch any fuel that may leak out. Place the towel in an approved container when disconnect is completed.

Tool Required: J 34730-1 Fuel Pressure Gage

1. Ignition "OFF."
2. Disconnect negative battery cable to avoid possible fuel discharge if an accidental attempt is made to start the engine.
3. Loosen fuel filler cap to relieve tank vapor pressure.
4. Connect gage J 34730-1 to fuel pressure connection. Wrap a shop towel around fitting while connecting gage to avoid spillage.
5. Install bleed hose into an approved container and open valve to bleed system pressure. Fuel line fittings are now safe for servicing.
6. Drain any fuel remaining in gage into an approved gasoline container.
7. Perform service required.
8. Tighten fuel filler cap.
9. Ignition "OFF."
10. Connect negative battery cable.
11. Cycle ignition "ON" and "OFF" twice, waiting ten seconds between cycles, then check for fuel leaks.

SERVICING QUICK-CONNECT FITTINGS

Note:
- In order to install fuel system diagnostic equipment on vehicles equipped with plastic quick-connect fittings, fuel line separator tools must be used to disconnect the fittings. Using the separator tools to release the fittings will cause the plastic retainer to remain inside the female connector allowing diagnostic equipment to be connected.

Tools required:
J 37088-A tool set, fuel line quick-connect separator; J 39504 tool set, fuel line quick-connect separator (restricted access).

Remove or Disconnect

1. Relieve fuel system pressure.

2. If equipped, slide dust cover back to access quick-connect fitting.

3. Grasp both sides of fitting. Twist female connector 1/4 turn in each direction to loosen any dirt within fitting.

CAUTION: Safety glasses must be worn when using compressed air, as flying dirt particles may cause eye injury.

4. Using compressed air, blow dirt out of fitting.

5. Choose correct tool from J 37088-A or J 39504 tool set for size of fitting. Insert tool into female connector, then push/pull inward to release locking tabs.

6. Pull connection apart.

Clean and Inspect

NOTE: If it is necessary to remove rust or burrs from fuel pipe, use emery cloth in a radial motion with the pipe end to prevent damage to O-ring sealing surface.

- Using a clean shop towel, wipe off male pipe end.
- Inspect both ends of fitting for dirt and burrs. Clean or replace components/assemblies as required.

Install or Connect

CAUTION: To Reduce the Risk of Fire and personal injury:

- Before connecting fitting, always apply a few drops of clean engine oil to the male pipe end of engine fuel pipe, pressure gage adapter or fuel line shut-off adapter. This will ensure proper reconnection and prevent a possible fuel leak. (During normal operation, the O-rings located in the female connector will swell and may prevent proper reconnection if not lubricated.)

1. Apply a few drops of clean engine oil to the male pipe end of engine fuel pipe, pressure gage adapter or fuel line shut-off adapter.

2. Push both sides of fitting together to cause the retaining tabs/fingers to snap into place.

3. Once installed, pull on both sides of fitting to make sure connection is secure.

4. If equipped, reposition dust cover over quick-connect fitting.