For 1990-2009 cars

Caution: Remove the fuel tank cap and relieve the fuel system pressure before servicing the fuel system in order to reduce the risk of personal injury. After you relieve the fuel system pressure, a small amount of fuel may be released when servicing the fuel lines, the fuel injection pump, or the connections. In order to reduce the risk of personal injury, cover the fuel system components with a shop towel before disconnection. This will catch any fuel that may leak out. Place the towel in an approved container when the disconnection is complete.

Notice: Do not perform this test for more than 2 minutes in order to prevent damaging the catalytic converter.

1. Loosen the fuel filler cap to relieve the fuel tank pressure.
2. Disconnect the fuel pump relay electrical connector.
3. Crank the engine.
4. Allow the engine to stall.
5. Crank the engine for an additional three seconds to assure relief of any remaining fuel pressure.

Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

6. Disconnect the negative battery cable, in order to avoid re-pressurizing the fuel system.
7. Reconnect the fuel pump relay electrical connector.
8. Tighten the fuel filler cap.