Fuel pressure relief (Chevrolet Lumina 1)

Warning 1: Gasoline is extremely flammable and extra precautions are required when working around any part of the fuel system.

Warning 2: After relieving fuel pressure, wrap a rag around any fuel connection you will be disconnecting. It will absorb any remaining fuel that may leak out. This will reduce the risk of fire and prevent fuel from coming into contact with your skin.

1. Before servicing any fuel system component, relieve fuel pressure to minimize the risk of fire or injury.

2. Remove the cap from the tank neck; this will relieve any pressure remaining in the tank.

Engine 3.1 l (tBI system model 220)

3. Vehicles with the TBI system have a fuel pressure regulator, the peculiarity of which is to ensure constant circulation of fuel, which leads to automatic pressure relief. Therefore, there is no need to perform a special fuel pressure relief procedure. After turning off the ignition, it takes about 10 minutes for the fuel pressure to release.

Engine 3.8 l (pFI system)

4. On PFI models, use one of the following two methods to relieve fuel pressure:

• a) Disconnect the fuel pump electrical connector at the fuel tank (lower the tank if necessary). Start the engine and wait until it stops, then crank the starter for another three seconds. With the ignition switched off (turning the key to the "OFF" position), reconnect the fuel tank electrical connector, then disconnect the wire from the negative battery terminal.
• b) Remove the cap from the filler neck of the tank. Connect a fuel pressure gauge (J34730-1) or equivalent to the valve on the fuel rail (see illustration). Place the bleed hose on the pressure gauge into a special container with fuel. Open the valve on the gauge to relieve pressure, then disconnect the cable from the negative battery terminal.

5. If this work is not performed before servicing fuel lines or connections, fuel splashing may occur and personal injury may occur.

The article is reprinted from the website: «ChevyMan.ru»