Tool - Fuel Pressure Test Adaptor and Procedure

Fuel Pressure Test New Adaptor

MODEL
1992 MY XJS

DATE
6/92



19-19



ISSUE:

A fuel pressure test adaptor (JD 181) has been developed for 1992 MY XJS vehicles from VIN 179740.

The adaptor has identical end fittings to the fuel rail and fuel supply hose. It also has a 1/4 BSP end gauge fitting to be used in conjunction with pressure gauge YWB 107 (Epitest equipment pressure gauge).

ACTION:

When the fuel system has to be pressure tested, use adaptor JD 181 and the following procedure:


NOTE:
Observe all safety precautions detailed in the Repair Manual.


^ Open the trunk and displace the right hand trim liner.





^ Remove the fuel pump relay (a silver relay on a black/yellow base, Fig. 1).

^ Crank the engine to depressurize the fuel system.

^ Install the fuel pump relay.

^ Open the hood and fit fender covers.





^ Loosen the union nut (Fig. 2 A), remove the fuel supply hose from the fuel rail and remove the "Viton" seal.



^ Install new "Viton" seal to pressure test adaptor JD 181. Install the pressure test adaptor to the fuel rail and tighten the union nut.

^ Install another "Viton" seal to the supply hose and connect to the pressure test adaptor. Tighten the union nut.





^ Install and tighten the pressure test gauge (YWB 107) to the adaptor (Fig. 3). Make sure a sealing washer is in place.





^ Disconnect the vacuum hose from the base of the fuel pressure regulator valve (Fig. 4 A).



^ Run the engine at idle and check the fuel pressure. Readings should be as follows:

2.5 bar, (36.7 psi) - vacuum hose disconnected
1.8 bar, (26.5 psi) - vacuum hose connected

^ Switch off the engine.

^ Depressurize the fuel system as detailed above.

^ Remove the pressure test adaptor and gauge, (Fig. 3).

^ Install a new "Viton" seal and install the supply hose to the fuel rail. Torque tighten the union nut to 10 to 12 N-m.

^ Connect the vacuum hose to the fuel rail pressure regulator valve.

^ Install the fuel pump relay and reposition the trim liner.

PARTS INFORMATION:

Part Number Description

JD 181 Fuel Pressure Test Adaptor

CBC 9113 Viton Seal