Fuel System Pressure Relief

WARNING: This page is about a different car, the 1998 GMC Sonoma and 1998 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Begin fuel system trouble shooting and diagnosis with checking fuel injection system pressure. High fuel pressure may be present in fuel lines and component parts. Relieve fuel pressure before disconnecting any fuel system components.

NOTE: For fuel pump circuit testing, FUEL SYSTEM ELECTRICAL CIRCUIT in NO START DIAGNOSIS .

Fuel system is under pressure. Pressure must be relieved prior to servicing fuel system. Fuel pressure may be relieved by using the following method:

Loosen fuel filler cap to relieve tank pressure (do not tighten at this time). Remove fuel pump relay. Start and run engine until it stalls. Crank starter for 3 seconds to remove remaining fuel from fuel lines. Turn ignition off. Reinstall fuel pump relay. Disconnect negative battery cable to avoid possible fuel discharge in accidental attempt to start engine.