Fuel Efficiency: Changing Fuel Filters For Optimal Performance

FASS fuel filters are a cost-effective way to ensure your vehicle's diesel engine is maintained. While some recommend changing the filters at 10,000-mile intervals, others suggest waiting until 15,000 or even 20,000 miles. However, it's important to watch out for warning signs that your filter needs replacing sooner, such as difficulty starting, a shaky ride at low speeds, and rough idling.

Difficulty starting the engine

A clogged or dirty fuel filter can cause difficulty starting your engine. This is one of the most common symptoms of a faulty fuel filter. If the filter is excessively dirty or clogged, it can restrict fuel pressure or flow, making it hard for your vehicle to start. This problem may be especially noticeable during cold starts or after your vehicle has been sitting idle for a while.

If you are experiencing hard starts, it is recommended to check and possibly replace your fuel filter. The recommended interval for changing FASS fuel filters varies depending on the vehicle and driving conditions. For some vehicles, it may be suggested to change the filters every other oil change (approximately every 12,000 kilometres) or after about 1,000 gallons of fuel has been used. Others may recommend changing the filters yearly or every 15,000 kilometres.

It is important to consult your vehicle's maintenance schedule and seek advice from a professional technician to determine the appropriate interval for changing your FASS fuel filters. Additionally, keeping extra filters on hand can be helpful in case of unexpected issues.

If you are experiencing difficulty starting your engine, in addition to checking your fuel filter, there are a few other potential causes to consider:

• Battery issues: A weak or failing battery may not provide enough power to the starter motor, making it difficult to turn over the engine.
• Fuel pump problems: A faulty fuel pump may not be delivering the correct amount of fuel to the engine, affecting the starting process.
• Ignition system faults: Issues with spark plugs, ignition coils, or other ignition system components can hinder the engine's ability to start.
• Clogged fuel injectors: If the fuel injectors are clogged, it can disrupt the precise delivery of fuel to the engine, impacting starting.

To diagnose the specific cause of your engine starting difficulties, it is recommended to consult a qualified mechanic who can perform a thorough inspection and recommend the necessary repairs or replacements.

Shaky ride at low speeds

A shaky ride at low speeds could mean that your FASS fuel filter is clogged. This is one of the most common warning signs that it's time to replace your diesel fuel filter. When a diesel fuel filter is clogged, fuel distribution becomes uneven and slow, causing the vehicle to struggle to get enough fuel to accelerate at low speeds. However, once the vehicle reaches higher speeds, it adjusts and drives just fine.

Most diesel fuel filters should be replaced every 10,000 to 25,000 miles, depending on the frequency of vehicle use and maintenance. However, it's important to keep an eye out for warning signs that the filter may need to be replaced sooner. In addition to a shaky ride at low speeds, other signs that your diesel fuel filter may be clogged include difficulty starting the engine and rough idling. If your engine has trouble starting, it's important to address the problem quickly to prevent a completely dead engine or one that dies while you're on the road.

When it comes to replacing your FASS fuel filter, there are a few options available. FASS offers a range of replacement filters, including the Drop-In Particulate Separator Filter (CWS1010), the Particulate Filter (PF3001), and the Extreme Water Separator Filter (XWS3002). These filters typically range in price from $20 to $35. It's recommended to keep extra filters on hand, as you may need to replace them more frequently if you encounter bad fuel.

In addition to replacing the fuel filter, it's also important to maintain your diesel filtration system properly. This includes regularly checking for any signs of wear or damage and seeking help from diesel fuel filter suppliers if you're unsure about the condition of your filter. By following these maintenance tips and keeping an eye out for warning signs, you can help ensure that your diesel engine runs smoothly and efficiently.

Rough idling

• Clogged or faulty fuel filters: If your fuel filters are old, dirty, or damaged, they may need to be replaced. It is recommended to replace fuel filters regularly, with some sources suggesting replacement every oil change (approximately every 12,000 km), every 15,000 km, or annually.
• Bacterial growth: Bacterial growth in the fuel filters can lead to dark-colored holes being eaten through the filter media. This can occur when filters are not replaced regularly, with some sources recommending replacement every year.
• Bad fuel: Running bad fuel through the system can also cause issues with the fuel filters and fuel pump. It is recommended to carry extra filters in case of bad fuel.
• Other engine issues: Rough idling may also be caused by issues unrelated to the fuel filters, such as problems with the ignition system, vacuum leaks, or faulty sensors.

To diagnose the cause of rough idling, it is recommended to check the fuel filters and engine for any signs of damage, clogging, or other issues. If the fuel filters appear to be in good condition, further diagnostics may be required to identify the root cause of the issue.

Cost-saving alternatives

FASS fuel filters are a cost-saving alternative to the OEM fuel filters for Cummins-powered Ram trucks. FASS filters are less than half the cost of OEM filters and can be easily installed at home. While OEM fuel filters can cost upwards of $300, FASS fuel filters typically range from $50 to $60.

For those seeking an even more affordable option, some forum users suggest purchasing alternative lift pumps such as the Raptor, Walbro, or Wicked Diesel Eliminator. These options typically range from $370 to $600, which is still a more cost-effective solution than the OEM setup. Additionally, external filtration units like the Racor 660R122 can be added to improve filtration further.

Another strategy to save costs is to extend the lifespan of your FASS fuel filters. While the recommended fuel filter service interval is 15,000 miles, FASS filters can last up to 20,000 to 30,000 miles, depending on fuel quality. Some users suggest changing the filters annually or after about 1,000 gallons of fuel has been run through them.

For those with newer, lower-mileage Rams, the Drop-In Series Fuel System by FASS is a cost-saving alternative. This system utilizes the OEM in-tank fuel pump and provides superior fuel filtration. With a price of around $450, it can pay for itself in under a year, considering the significant savings on fuel filter changes.

In conclusion, there are several cost-saving alternatives to changing FASS fuel filters. From opting for more affordable filter options to extending the lifespan of your filters and exploring alternative fuel systems, you can significantly reduce the expenses associated with fuel filter maintenance.

Recommended replacement mileage

Most diesel fuel filters should be replaced every 10,000 to 25,000 miles, but this can vary depending on how frequently the vehicle is used and how well it's maintained. For example, FASS filters are recommended to be replaced every 20,000-30,000 miles, depending on fuel quality.

Some people opt to change their fuel filters every other oil change, which for some vehicles is around 12,000 miles. Others change their filters at about 10,000 miles or yearly, whichever comes first.

One user suggested that after about 1,000 gallons of fuel has run through the filters, they should be replaced, or when/if you get bad fuel. They also recommended keeping extra filters on hand.

Another user suggested that the full-flow filter should be changed every 15,000 miles or so, and the w/s filter double that. They also recommended changing the factory filter every 50,000 miles if a FASS lift pump is in line.

Frequently asked questions