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How do I replace a fuel pump?

How do I replace a fuel pump?

Your vehicle's fuel pump is a fundamental part of its operation. Without it, your engine will not run. A fuel pump is designed to last the life of your car, but like any other component, it can become damaged and fail. We'll show you how to replace it and what to expect.

Why do I need to replace my fuel pump?

The mechanical fuel pump delivers fuel to the carburetor. It is activated by an eccentric on the camshaft via the rocker arm. An inlet line from the fuel tank is usually connected to the pump with a hose and clamp. The outlet line from the carburetor is usually made of steel and connected to the fuel pump by a tube fitting. Some pumps also have a vapor recovery tube. Driving is impossible without this, as it is responsible for transferring fuel from the tank.

Is a fuel pump a wearing part?

In general, a fuel pump should not be considered a consumable. Such a pump will work reliably and without restriction for the entire life of the car. Therefore, it is not necessary to change or replace the pump regularly. However, as with any other vehicle part, damage can occur.

How much does this part cost?

The price of this equipment may vary depending on the model and type of your car. In general, you can buy it for between $70 and $200. Be sure to compare prices and buy the right model for your car. Used parts are not recommended. It's a part that can't be repaired, so it's better to buy new. Expect to pay extra for labor if you prefer to leave this operation in the hands of a professional.

Replace the fuel pump yourself or have it replaced?

If you know how to work on vehicles and have access to a lift and the necessary tools, you can replace a fuel pump yourself. This is especially true for mechanical fuel pumps because they are installed directly on the engine.

Electric pumps, on the other hand, are often built right into the fuel tank and can be very difficult to reach. If you have little experience in repairing cars and their components, you should leave this work to a specialist shop. That's because when you replace it, you'll be working on both the vehicle's electrical system and directly on the fuel and associated gases. You should never try to replace the fuel pump yourself without experience and, above all, without the appropriate safety equipment.

In such a case, a specialist workshop is the best option, especially as such a replacement is a simple routine job and can be carried out in a relatively short time.

Replacing the fuel pump, step by step

Before You Begin

Whenever you work on your vehicle, we recommend that you follow these important safety rules:

  • Keep a first-aid kit handy.
  • Use caution when working near hot or sharp objects.
  • Follow the manufacturer's instructions for each product.
  • Use stanchions under the frame or ramps if the vehicle must be lifted.
  • Never run the engine if the work area is not adequately ventilated.
  • Do not smoke when working near the engine.

Begin by replacing the fuel pump:

  1. Drive the vehicle onto a lift.
  2. First check the connections, relays, fuses, and engine control unit. These can also cause failure and reduce the reliability of the fuel pump. For example, if you find worn wires, you may not need to replace the fuel pump.
  3. Next, locate the fuel pump. If it's installed directly in the fuel tank, it may be too complicated for non-professionals to remove. Often the fuel pump is located between the filler cap and the rear seat.
  4. Disconnect the vehicle's battery before performing any work.
  5. Remove all fuel lines from the fuel pump and close them. This will prevent accidental fuel leaks. Disconnect electrical and control lines from the pump.
  6. Carefully disassemble the fuel pump. Be sure to secure the bolts.
  7. Clean the fuel pump.
  8. Coat both sides of a new fuel pump seal with sealant or sealant paste.
  9. Place the mounting bolts on the new pump and slide the gaskets onto the bolts.
  10. Mount the new pump to the engine. Make sure the rocker arm in the pump is in contact with the eccentric in the engine, or that the pushrod is properly installed in the engine and fuel pump.
  11. Connect the outlet hose from the pump to the carburetor. If the hose is difficult to connect, disconnect the other end.
  12. Connect the hose to the pump, then reconnect it to the carburetor. Hold the pump connector with one wrench and tighten the nut with another wrench.
  13. Connect the intake hose from the fuel tank and the vapor recovery tube (if installed).
  14. Tighten all clamps securely.
  15. Reconnect the battery ground cable, start the vehicle, and check for leaks.

Now you know everything there is to know about the fuel pump and the main steps involved in replacing it.

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