How to Release Fuel Pressure Toyota Corolla

Fuel pressure release is a procedure where the continuous physical force of gasoline in the in the Toyota Corolla fuel line is discharged. You must allow for the fuel pressure to escape from the fuel lines anytime you plan to remove fuel system components.

If you do not depressurize the fuel system, a short burst of pressurized fuel will spatter yourself, including your eyes, and over everything in the area. If there is a nearby ignition point, such as a cigarette, open flame or work light, you risk becoming a human fireball.

Use these fuel pressure release procedures if you plan to remove a fuel system component from a Toyota Corolla.

Fuel Pressure Relief Procedure

The Toyota Corolla fuel system is under constant pressure so make sure you relieve fuel pressure before any fuel lines are disconnected. Since gasoline is extremely flammable, be certain to have a fire extinguisher handy. Wear eye protection and gloves at all times.

  1. Take off the fuel filler cap to help relieve fuel pressure that exist in the fuel tank.

    Remove gas cap to help relieve fuel pressure.
    Remove gas cap.
  2. Remove rear passenger seat cushion to get access to the fuel pump. Remove the fuel pump cover. Some models have 4 screws holding the cover in place while other models the fuel pump cover is secured with type, in which case you will need to pry the cover off.

    Remove rear seat to gain access to the fuel pump wire connection diagram.
    Remove back seat cushion.
  3. Disconnect the electrical connections at the fuel pump.

  4. Start the Toyota Corolla and let it run until it stalls. Keep trying to start the car until it will not run. When the engine will no longer run, crank the engine for 4 seconds and remove the key from the ignition switch.
  5. The fuel system on your Toyota Corolla is now depressurized.
  6. Always place a shop rag underneath any fuel system component you plan to remove so as to catch spilt fuel.
  7. Remove the negative cable from the battery terminal before servicing the fuel system.

Be certain to reinstall fuel line connections properly. If a fuel line were to pop off while driving, there’s a good possibility the fuel will ignite and the car will catch on fire. When the fuel system is put back together, prime the system by turning the key to the ON position, then check for fuel leaks.

If no fuel leaks are evident. Start the vehicle and and let it idle. Then check for fuel leaks again.

Model & Year Application

These servicing procedures apply to the following year and models.
2003Toyota CorollaCE, S, LE1.8L I-4 Engine
2004Toyota CorollaCE, S, LE1.8L I-4 Engine
2005Toyota CorollaCE, S, LE1.8L I-4 Engine
2006Toyota CorollaCE, S, LE1.8L I-4 Engine
2007Toyota CorollaCE, S, LE1.8L I-4 Engine
2008Toyota CorollaCE, S, LE1.8L I-4 Engine

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