DeVille V8-4.9L VIN B (1995)
Fuel Pressure Release: Service and Repair
WARNING: To reduce the risk of fire and personal injury, it is necessary to relieve the fuel system pressure before servicing fuel system
components. After relieving fuel system pressure, a small amount of fuel may be released when servicing fuel pipes or connections. In order to
reduce the chance of personal injury, cover fuel pipe fittings with a shop towel before disconnecting1 to catch any fuel that may leak out. Place
the towel in an approved container when disconnect is completed.
Tool Required: J 34730-1 Fuel Pressure Gauge
1. Loosen fuel filler cap to relieve tank vapor pressure.
2. Ignition "OFF."
3. Disconnect negative battery cable to avoid possible fuel discharge if an accidental attempt is made to start the engine.
4. Connect gauge J 34730-1 to fuel pressure connection. Wrap a shop towel around fitting while connecting gauge to avoid spillage.
5. Install bleed hose into an approved container and open valve to bleed system pressure. Fuel connections are now safe for servicing.
6. Drain any fuel remaining in gauge into an approved container.
