Fuel System Pressure Release (Gasoline)
WARNING: This page is about a different car, the 2002 Pontiac Sunfire and 2002 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Always release fuel pressure before disconnecting any fuel injection-related component. DO NOT allow fuel to contact engine or electrical components.
Fuel system is under pressure. Pressure must be released prior to servicing fuel system. Fuel pressure may be released by using one of the following methods:
- On 2.2L (VIN F), disconnect negative battery terminal. Clean areas around fuel pressure connector of fuel rail. Wrap a shop towel around fuel pressure connector to absorb fuel leakage. Install Fuel Pressure Gauge (J 34730-1A) on fuel pressure connector. Install gauge bleed hose into approved gasoline container. Open bleed valve to bleed the system pressure. The fuel connections are now safe for servicing.
- On 2.2L (VIN 4) and 2.4L, raise and support vehicle. Disconnect fuel pump connector. See Fig 1. Lower vehicle. Start and run engine until it stalls. Crank starter for 3 seconds to remove remaining fuel from fuel lines. Turn ignition off. Raise and support vehicle. Reconnect fuel pump connector. Lower vehicle. Disconnect negative battery cable to avoid possible fuel discharge in accidental attempt to start engine.