Changing The Fuel Filter In A Nissan Np300: Step-By-Step Guide

The fuel filter in your Nissan NP300 Navara should be replaced at the correct intervals to ensure optimal performance and fuel economy. The fuel filter's job is to remove any harmful dirt or debris from the fuel before it enters the fuel injectors, and it is usually located with the fuel pump inside the fuel tank or in the fuel line between the tank and the fuel rail. If you're looking to replace the fuel filter yourself, there are a number of how-to videos on YouTube that can guide you through the process, or you can book your car in with a mechanic. The cost of replacing the fuel filter will depend on the location of the filter and can range from $120 to $400.

The fuel filter is usually located with the fuel pump inside the fuel tank

The fuel filter is typically found somewhere between a vehicle's engine and fuel tank. It is usually inside the fuel tank itself, in the opening of the fuel line, or along the fuel line running underneath your vehicle. The exact location of the fuel filter depends on the vehicle's make and model. For example, 1995-2002 Honda Accord models have the fuel filter near the brake master cylinder at the back of the engine, while a 2002 Toyota Corolla has the fuel filter inside the fuel tank, underneath the rear seat cushions.

Before accessing the fuel filter, it is important to relieve the pressure in the fuel system. This can usually be done by allowing the engine to run for a minute or so without the fuel pump functioning. Find and remove the relay, then start the vehicle and let it exhaust the fuel pressure. You may also need to disconnect the battery to prevent the engine from being started during the rest of the process.

To access the fuel filter, you may need to jack up your vehicle if it is located on the underside. Place a bowl or bucket beneath the fuel filter to catch any fuel that may spill out when you disconnect the lines. The fuel filter is often held in place by plastic clips, which can be removed with a flat-head screwdriver. Be careful, as these clips may break during removal.

Once the clips are removed, slide the fuel lines away from the filter and remove them from the nozzles on either end. Then, slide the fuel filter out of its bracket. The new fuel filter can then be installed by following these steps in reverse. Ensure that the new filter is properly secured and that there are no fuel leaks before lowering the vehicle and reconnecting the battery.

Replacing the fuel filter can cost between $120 and $400

The cost of replacing a fuel filter can vary depending on several factors, including the type of vehicle, the labour costs, and the specific parts and labour rates in your region.

On average, the cost of replacing a fuel filter can range from $70 to $150, but this can vary depending on the type of filter and labour costs. Some sources suggest that a more reasonable range is between $90 and $142 for parts and labour combined.

It is worth noting that the fuel filter is an essential component of your vehicle's fuel system, and it is recommended to replace it periodically as part of routine maintenance. By replacing the fuel filter before it becomes clogged, you can help maintain optimal engine performance and avoid more costly repairs down the line.

In some cases, the cost of replacing a fuel filter can be higher, such as in the case of a Honda Civic owner who was charged $450 AUD for a fuel filter replacement, which included nearly two hours of labour. While this may be an outlier, it is always a good idea to get an estimate from your local mechanic or dealership before proceeding with any repairs or replacements.

Additionally, it is worth mentioning that some vehicles may have fuel filters that are not a regular maintenance item and are considered lifetime parts. In such cases, replacement may not be necessary unless there is a specific issue with the fuel filter.

The filter needs to be replaced at the correct intervals

It is important to note that attempting to prime the filter by cranking the engine can cause significant damage to the injection pump, so it is advised to seek the help of an experienced mechanic. When replacing the filter, it is crucial to follow the manufacturer's instructions and properly tighten all connections to avoid leaks. Over-priming the filter slightly can help identify any loose connections before they become a more expensive issue.

To ensure the fuel system is properly bled, the tank can be slightly pressurized. Additionally, disconnecting the battery terminals and crossing the positive and negative terminals can help reset the fuel pump and clear any residual pressure. This method has been reported to be successful by some Navara owners.

Maintaining the fuel filter at regular intervals is crucial to the vehicle's performance and longevity. While the recommended interval is every 100,000 km, it is essential to consider fuel quality and other factors that may impact the filter's lifespan.

Failure to replace the filter can cause problems with the fuel injectors

The fuel filter plays a crucial role in keeping your engine running smoothly. It acts as a barrier, trapping dirt, contaminants, and other particles, preventing them from entering the fuel injection system and causing damage. Without a properly functioning fuel filter, these impurities can clog the fuel injectors, leading to significant performance issues and even engine failure.

When a fuel filter becomes clogged, it restricts the optimal flow of fuel to the engine. This can cause the fuel injectors to receive dirty fuel or not enough fuel, resulting in problems such as shaky idling, poor performance, and difficulty starting the vehicle. Over time, the fuel pump has to work harder to compensate for the clogged filter, which can lead to decreased fuel efficiency and, eventually, engine failure.

If left unchanged for too long, a clogged fuel filter can cause the fuel injectors to become completely blocked. This will starve your engine of fuel, leading to a no-start situation. The fuel injectors will be unable to deliver the required amount of fuel to the engine, resulting in a vehicle that won't turn over.

Additionally, a clogged fuel filter can cause the fuel injectors to deliver contaminated fuel to the engine. This can lead to a build-up of dirt and grime in the injectors, affecting their performance and lifespan. Contaminated fuel can also cause internal damage to the injectors, leading to costly repairs or replacements.

Therefore, it is essential to replace the fuel filter at regular intervals to prevent problems with the fuel injectors. Depending on the age of your vehicle and the manufacturer's recommendations, fuel filters should typically be replaced every 20,000 to 70,000 miles. However, if you frequently drive in dusty or dirty conditions, it is advisable to change the filter more often, ensuring optimal fuel quality and engine performance.

You don't need to clear the pump codes after a fuel filter change

How to Change NP300 Fuel Filter

You don't need to clear the pump codes after changing the fuel filter on your NP300. Simply replace the filter, turn the ignition on, and wait for the fuel pump to start and build pressure. You'll know it's ready when you hear a slight hissing sound, which indicates that the system has primed. At this point, you can start the engine, and there's no need to worry about clearing any codes.

Some people may choose to clear the pump codes for "peace of mind," but it's not a necessary step. The pump will continue to work as intended without any manual intervention.

If you encounter any issues with the engine not starting after changing the fuel filter, it's recommended to refitted the old filter and seek professional assistance.

It's important to note that manually priming the filter by cranking the engine can cause significant damage to the injection pump, so it's best to leave this task to an experienced mechanic.

Additionally, over-priming the filter by a few extra pumps after the primer gets firm can help identify any potential leaks due to loose connections. This simple step can help prevent costly issues down the line.

Frequently asked questions