Fuel Pressure: Testing and Inspection

Fig. 44 Connecting fuel pressure gauge.:

1. Remove rear seat cushion, then start engine.
2. Disconnect fuel pump electrical connector(s) with engine running.
3. Turn ignition off after engine stalls.

NOTE: Before disconnecting the battery use a keep alive memory tool if available. See inset in Fig. 44.

4. Disconnect battery ground cable.
5. Connect pressure tester 49 9200 750, Fig. 44.
6. Reconnect battery ground cable, then start engine and observe fuel pressure. Fuel pressure should measure 28-31 psi.
7. Disconnect and block vacuum hose from pressure regulator. Fuel pressure should measure 35-41 psi.
8. If fuel pressure is not as specified, check fuel pump pressure and condition of fuel filter. If satisfactory, replace pressure regulator.