Fuel Delivery and Air Induction: Service and Repair

Fig. 20 Plastic Quick-Connect Fittings:

NOTE: Fuel tubes connect fuel system components with plastic quick-connect fuel fittings. The fitting contains non-serviceable 0-ring seals (Fig. 20).


CAUTION: Quick-connect fittings are not serviced separately. Do not attempt to repair damaged quick-connect fitting or fuel tubes. Replace the complete fuel tube/quick-connect fining assembly.

OPERATION
The quick-connect fitting consists of the 0-rings, retainer and casing (Fig. 20). When the fuel tube enters the fitting, the retainer locks the shoulder of the nipple in place and the 0-rings seal the tube.

NOTE: When disconnecting a quick-connect fitting, the retainer will remain on the fuel tube nipple.

WARNING: Release fuel system pressure before disconnecting a quick-connect fittings. Refer to the procedure. Service and Repair

REMOVAL
1. Disconnect negative cable from the battery.
2. Perform the Fuel Pressure Release Procedure. Refer to procedure.
3. Squeeze retainer tabs together and pull fuel tube/quick-connect fitting assembly off of the fuel tube nipple. The retainer will remain on the fuel tube.

INSTALLATION
1. Using a clean lint free cloth, clean the fuel tube nipple and retainer.
2. Prior to connecting the fitting to the fuel tube, coat the fuel tube nipple with clean 30 weight engine oil.

CAUTION: Never install a quick-connect fitting without the retainer being either on the fuel tube or already in the quick-connect fitting. In either case, ensure the retainer locks securely into the quick-connect fitting by firmly pulling on fuel tube and fitting to ensure it is secured.

Fig. 21 Plastic Quick-Connect Fitting/Fuel Tube Connection:

3. Push the quick-connect fitting over the fuel tube until the retainer seats and a click is heard.
- The quick-connect fitting has windows in the sides of the casing. When the fitting completely attaches to the fuel tube, the retainer locking ears and the fuel tube shoulder are visible in the windows.
- If they are not visible, the retainer was not properly installed (Fig. 21).
- Do not rely upon the audible click to confirm a secure connection.

4. Ensure the locking ears on the retainer and the shoulder (stop bead) on the fuel tube are completely visible in the quick-connect fitting windows. Do not rely upon the audible click to confirm a secure connection. Always pull on the line and fitting to ensure that retainer is seated.
5. Verify the connection by pulling on the lines. If the fitting locks in place, the connection is secure.

CAUTION: When using the ASD Fuel System Test, the Auto Shutdown (ASD) Relay remains energized for either 7 minutes, until the test is stopped, or until the ignition switch is turned to the Off position.

6. Use the DRB or equivalent scan tool ASD Fuel System Test to pressurize the fuel system. Check for leaks.