Replacing The Waja Fuel Pump: Step-By-Step Guide

The Proton Waja is a car model that has been associated with fuel pump issues. Owners of the Waja have reported problems with the fuel pump, including jerking, loss of power, and engine failure. In some cases, the fuel pump may need to be replaced. This can be done by accessing the fuel pump through the rear seat or by removing the fuel tank from the undercarriage of the car. The cost of replacing the fuel pump can vary depending on the type of pump and labour costs, but it typically ranges from RM220 to RM600.

Fuel pump failure symptoms

Fuel pumps are designed to last up to 100,000 miles, and most people never have to change them. However, it's important to be aware of the symptoms of a failing fuel pump to ensure a smooth and safe driving experience. Here are some signs that your fuel pump may be failing:

• Unusual fuel tank noises: A functioning fuel pump will make a low humming sound, but if you hear a loud whining noise, it could indicate a malfunctioning fuel pump.
• Struggling car starts: If your engine stumbles and makes popping sounds when you try to start it, it could be due to a faulty fuel pump that is unable to circulate fuel through the fuel line to the engine.
• Engine sputtering: A failing fuel pump can cause the engine to sputter, especially at higher speeds, as it may not be providing enough fuel to the engine.
• Unexpected stalling: Unexpected stalling while driving can be dangerous and may be caused by an ageing or degraded pump motor that has caused the engine to overheat.
• Losing power during heavy loads or inclines: If your car suddenly loses power while driving uphill or carrying a heavy load, it could be because the fuel pump cannot provide the necessary fuel pressure and flow for high-speed driving.
• Surging engine performance: A faulty fuel pump can cause the fuel pressure regulator to leak, leading to inconsistent fuel delivery and surging power.
• Decreased fuel efficiency: If your car is consuming more fuel than usual, it could be due to a valve within the fuel pump failing to open, resulting in an excessive amount of fuel entering the fuel system.
• Dead fuel pump: If your car won't start, it could be due to a dead fuel pump. However, it's important to rule out other potential issues, such as electrical faults, problems with the ignition switch, faulty fuel injectors, or a malfunctioning fuel pressure regulator.

Fuel pump testing

If you're experiencing issues with your Waja's fuel pump, there are several tests you can perform to diagnose the problem.

Firstly, check whether the problem is fuel-related. If your engine won't start, listen for the fuel pump by putting your ear near the fuel tank while turning the ignition key to the "on" position. If the pump is working properly, you should hear an audible noise. Alternatively, try the "whack test" by having an assistant crank the engine while you hit the fuel tank with a rubber mallet. If the vehicle starts, it indicates an issue with the electric motor inside the pump.

You can also perform a starter fluid test (use caution and safety equipment as this can be dangerous). Remove the air intake and spray starter fluid into the throttle body while an assistant cranks the engine. If the engine starts momentarily, it confirms a fuel-related problem, possibly a bad pump.

If your engine exhibits performance problems but still starts, check for diagnostic trouble codes (DTCs) with a scanner or code reader. A faulty pump may set DTCs related to the fuel pump or air/fuel ratio. You can also check fuel trim with a scan tool; if the fuel trim reading is above 10, it indicates the engine is running lean and the fuel pump may not be delivering.

Checking fuel pressure and/or volume will help determine if enough fuel is making it from the tank to the engine. Use a mechanical fuel pressure gauge and connect it to the test port on the fuel rail. Compare the reading to the specification in your repair manual. If the reading is significantly different, it may indicate a bad fuel pump.

Additionally, you can perform a fuel volume test. Connect the gauge and place the bleed end of its hose into a clean container. Activate the pump for 15 seconds while holding down the relief valve. Typically, the pump should deliver about a pint of fuel.

Before condemning the pump, there are a few other things to check. Verify the fuel pump electrical circuit and check the integrity of the wiring in the pump circuit with a digital multimeter (DMM). Also, check the fuel pressure regulator and the fuel filter, as issues with these components can limit the fuel supply.

For more advanced testing, you can use an oscilloscope to measure current draw or a professional-grade scan tool to remotely activate the pump.

Fuel pump replacement cost

The fuel pump is an essential component of a vehicle as it is responsible for transferring fuel from the gas tank to the engine. Without it, the engine will seize. Fuel pump replacement costs vary depending on the vehicle's age, make and model, as well as the complexity of the design.

The average cost for a fuel pump replacement is between $220 and $1,146, with parts priced between $95 and $1,110, and labor costs between $124 and $350. However, these prices do not include taxes and fees, and the location of the repair facility can also impact the final cost.

For instance, newer models from automakers like BMW, Honda, Chevrolet, and Toyota have an average cost for fuel pump replacement between $611 and $894. More expensive vehicles with complex designs can cost up to $2,500 to replace the fuel pump.

In some cases, it may be possible to replace the fuel pump yourself, especially if it is accessible from under the rear seat. However, due to the risk of fire, it is generally recommended to leave this job to a professional mechanic.

In addition to the cost of the fuel pump replacement, it is also advisable to replace the fuel filter and the fuel pump relay at the same time, as these components can also fail and lead to additional repairs.

To extend the life of a fuel pump, it is recommended to keep the gas tank at least a quarter full, ensure a secure seal on the gas cap, and service the vehicle at the recommended intervals.

Fuel pump brand recommendations

When it comes to fuel pump brand recommendations, there are several options available that offer high-quality and reliable performance. Here are some of the top brands to consider:

Bosch: Bosch is often referred to as the "gold standard" in fuel components. Their Turbine electric fuel pump features a design that offers near-silent operation, improving drivability and reducing wear. It also includes a non-return valve that maintains system pressure, preventing hot-start problems. Bosch fuel pumps are known for their high quality and efficiency.

Denso: Denso is a well-known manufacturer of high-quality OEM replacement parts, including fuel components. Their electric fuel pumps feature an OEM-quality construction and come with a one-year warranty. Denso also subjects their fuel pumps to rigorous testing and inspection processes to ensure they meet the company's high standards.

Delphi: Delphi is another big name in OEM replacement parts. Their electric fuel pumps are built to OEM standards and are designed to operate in extreme temperatures, providing quick engine starts and avoiding low-fuel hesitation. Delphi's fuel pumps are ideal for hot or cold climates and feature low-amperage drawing characteristics, reducing the load on your vehicle's electrical system.

CARQUEST: CARQUEST, an Advance Auto Parts brand, offers solid-performing and proven electric fuel pumps. Their fuel pumps meet or exceed Original Equipment Manufacturer (OEM) specifications, ensuring peace of mind and reliable performance. CARQUEST fuel pumps are also 100% performance tested, guaranteeing quiet operation, longer service life, and industry-leading durability.

Holley: Holley Performance Products is a leading brand in the world of aftermarket performance parts. The Holley Mighty Mite electric fuel pump is designed for performance enthusiasts, offering benefits such as easy installation, self-priming and regulating construction, and quiet operation. It is ideal for vehicles making around 400 horsepower naturally aspirated and is compatible with all fuel types.

When choosing a fuel pump brand, it is important to consider factors such as reliability, performance, durability, and compatibility with your specific vehicle. Always ensure that you select a fuel pump that meets the requirements of your particular make and model, including flow rate and pressure specifications.

Fuel pump access

To access the fuel pump in a Proton Waja, you will need to remove the rear seat of the car.

• Locate the two locks on the front bottom of the rear seat: one on the left and one on the right.
• Pull the two seat locks to unlock the seat.
• Remove the seat by lifting it up and pulling it forward.
• Once the seat is removed, you will see another round metal cover. Remove this cover to access the fuel pump.

It is important to note that this process may vary slightly depending on the model and year of your Proton Waja. Some models may require accessing the fuel pump from underneath the car or by removing the fuel tank.

Additionally, always exercise caution when working on your vehicle and refer to a qualified mechanic if you are unsure about any steps.

Frequently asked questions