The Can-Am Commander, a rugged and versatile side-by-side, is built for adventure. But even the toughest machines can experience hiccups, and fuel pump problems are a surprisingly common headache for Commander owners. A failing fuel pump can leave you stranded on the trail, turning a fun outing into a frustrating ordeal. Understanding the potential issues, symptoms, and solutions can save you time, money, and a lot of aggravation. Let's dive into the world of Can-Am Commander fuel pumps and how to keep them pumping strong.

So, Your Commander's Acting Up? Is It the Fuel Pump?

Before you start tearing into your machine, it's crucial to confirm that the fuel pump is indeed the culprit. Several symptoms can point to a failing fuel pump, but they can also be caused by other issues. Here's a breakdown of the most common telltale signs:

  • Difficulty Starting: This is often the first sign. The engine might crank and crank, but it just won't fire up. This happens because the fuel pump isn't delivering enough fuel to the engine to start.

  • Engine Stalling: The engine might start fine, but then stalls shortly after or while driving. This can occur sporadically at first, and then become more frequent as the pump deteriorates. This could be due to the pump overheating and shutting down or simply not being able to maintain adequate fuel pressure.

  • Loss of Power, Especially Under Load: Notice a significant drop in power when accelerating or going uphill? This indicates the fuel pump isn't providing enough fuel to meet the engine's demands under increased load. The engine might feel sluggish and unresponsive.

  • Erratic Engine Performance: This can manifest as sputtering, hesitation, or surging. These symptoms suggest an inconsistent fuel supply, which can be caused by a partially clogged or failing fuel pump.

  • Increased Engine Temperature: A lean fuel condition (not enough fuel) caused by a failing pump can lead to increased engine temperatures. Keep an eye on your temperature gauge!

  • Whining Noise from the Fuel Tank Area: A failing fuel pump can sometimes emit a high-pitched whining or buzzing sound. This is often a sign that the pump is struggling to operate.

Important Note: Don't immediately assume it's the fuel pump based on these symptoms alone. Other potential causes include:

  • Clogged Fuel Filter: This is a much easier and cheaper fix than replacing the entire fuel pump.
  • Faulty Fuel Injectors: Injectors can become clogged or malfunction, leading to similar symptoms.
  • Bad Gas: Contaminated or stale fuel can cause a variety of engine problems.
  • Electrical Issues: Problems with the wiring or the fuel pump relay can prevent the pump from functioning correctly.

What Makes a Commander Fuel Pump Go Bad? Common Culprits

Understanding why fuel pumps fail can help you prevent future problems. Here are some of the most common causes:

  • Contaminated Fuel: This is the number one enemy of fuel pumps. Dirt, debris, and water in the fuel can clog the pump's filter and damage its internal components. Always use clean, fresh fuel and consider using a fuel stabilizer, especially if your Commander sits for extended periods.

  • Running the Tank Low: Regularly running your fuel tank close to empty can cause the fuel pump to overheat. The fuel acts as a coolant for the pump, and when the level is low, the pump has to work harder and gets hotter. Over time, this can significantly shorten its lifespan.

  • Age and Wear: Like any mechanical component, fuel pumps have a limited lifespan. Over time, the internal components can wear out, leading to reduced performance and eventual failure.

  • Electrical Issues: Voltage fluctuations or a faulty fuel pump relay can damage the pump's motor.

  • Ethanol in Fuel: Ethanol, commonly found in gasoline, can absorb water and corrode fuel system components, including the fuel pump.

Diagnosing the Problem: Time to Get Your Hands Dirty (or Call a Pro)

If you suspect your Can-Am Commander fuel pump is failing, here's a step-by-step diagnostic process:

  1. Visual Inspection:

    • Check the fuel lines for any kinks, cracks, or leaks.
    • Inspect the fuel tank for any signs of contamination or debris.
    • Examine the fuel filter. If it's dirty, replace it.

  2. Listen for the Fuel Pump:

    • Turn the ignition key to the "on" position (without starting the engine). You should hear the fuel pump prime for a few seconds. If you don't hear it, the pump might be dead or there could be an electrical issue.

  3. Check the Fuel Pump Relay and Fuse:

    • Locate the fuel pump relay and fuse in your Commander's fuse box (refer to your owner's manual).
    • Check the fuse for continuity. If it's blown, replace it with a fuse of the same amperage.
    • Test the relay using a multimeter or by swapping it with a known good relay.

  4. Measure Fuel Pressure:

    • This is the most accurate way to diagnose a fuel pump problem.
    • You'll need a fuel pressure gauge and the appropriate adapter for your Commander.
    • Connect the gauge to the fuel rail and check the pressure with the engine running.
    • Refer to your service manual for the correct fuel pressure specifications. Low fuel pressure indicates a failing fuel pump.

  5. Check for Voltage at the Fuel Pump:

    • Disconnect the fuel pump wiring connector and use a multimeter to check for voltage when the ignition is turned on.
    • If you're not getting voltage, there's an electrical problem in the wiring or the fuel pump relay.

When to Call a Pro: If you're not comfortable performing these tests, or if you're unsure about the results, it's best to take your Commander to a qualified mechanic. They have the tools and expertise to accurately diagnose and repair the problem.

Replacing the Fuel Pump: DIY or Professional Installation?

Replacing a Can-Am Commander fuel pump can be a moderately challenging task, depending on your mechanical skills and experience. Here's a breakdown of the process and considerations:

DIY Replacement:

  • Pros:
    • Saves money on labor costs.
    • Gives you a better understanding of your machine.
  • Cons:
    • Requires mechanical skills and tools.
    • Can be time-consuming.
    • Risk of damaging other components if not done correctly.

Professional Installation:

  • Pros:
    • Ensures the job is done correctly.
    • Saves you time and effort.
    • Provides peace of mind.
  • Cons:
    • Higher cost due to labor charges.

If you decide to tackle the replacement yourself, here's a general overview of the steps involved (always refer to your service manual for specific instructions):

  1. Gather Your Tools and Supplies:

    • New fuel pump assembly (ensure it's compatible with your Commander model)
    • Fuel filter
    • Fuel line disconnect tool
    • Socket set
    • Wrench set
    • Screwdrivers
    • Multimeter
    • Safety glasses
    • Gloves
    • Drain pan
    • Shop towels

  2. Disconnect the Battery: This is crucial for safety.

  3. Drain the Fuel Tank: Use a siphon or a fuel pump to remove as much fuel as possible from the tank.

  4. Access the Fuel Pump: The location of the fuel pump varies depending on the Commander model. It's typically located under the seat or in the fuel tank itself. You may need to remove the seat, body panels, or the entire fuel tank to access it.

  5. Disconnect Fuel Lines and Electrical Connectors: Use the fuel line disconnect tool to carefully disconnect the fuel lines from the fuel pump assembly. Disconnect the electrical connector as well.

  6. Remove the Old Fuel Pump Assembly: Unbolt or unscrew the fuel pump assembly from the fuel tank.

  7. Install the New Fuel Pump Assembly: Install the new fuel pump assembly in the reverse order of removal. Make sure all connections are secure.

  8. Install a New Fuel Filter: This is a must-do!

  9. Reconnect Fuel Lines and Electrical Connectors: Reconnect the fuel lines and electrical connector.

  10. Refill the Fuel Tank: Add fresh, clean fuel to the tank.

  11. Reconnect the Battery:

  12. Prime the Fuel System: Turn the ignition key to the "on" position (without starting the engine) several times to prime the fuel system.

  13. Start the Engine: Start the engine and check for any leaks.

Important Safety Precautions:

  • Work in a well-ventilated area.
  • Avoid sparks or open flames.
  • Wear safety glasses and gloves.
  • Dispose of used fuel properly.

Choosing the Right Fuel Pump: OEM vs. Aftermarket

When replacing your Can-Am Commander fuel pump, you'll have the option of choosing between an OEM (Original Equipment Manufacturer) pump and an aftermarket pump. Here's a comparison:

  • OEM Fuel Pumps:
    • Pros: Guaranteed to fit and function correctly. High quality and reliability.
    • Cons: More expensive than aftermarket options.
  • Aftermarket Fuel Pumps:
    • Pros: Less expensive than OEM pumps. Wide variety of brands and options available.
    • Cons: Quality can vary significantly. May not fit or function as well as OEM pumps.

Recommendation: If you want the best reliability and performance, an OEM fuel pump is generally the best choice. However, if you're on a tight budget, a reputable aftermarket brand can be a viable option. Do your research and read reviews before making a decision.

Keeping Your Fuel Pump Happy: Preventative Maintenance Tips

Preventing fuel pump problems is always better (and cheaper) than fixing them. Here are some tips to keep your Can-Am Commander fuel pump in good working order:

  • Use Clean, Fresh Fuel: Always use high-quality gasoline from a reputable source. Avoid using stale or contaminated fuel.
  • Add Fuel Stabilizer: If your Commander will be sitting for extended periods, add a fuel stabilizer to prevent fuel degradation and corrosion.
  • Don't Run the Tank Low: Avoid running your fuel tank close to empty. Keep it at least 1/4 full to help keep the fuel pump cool.
  • Replace the Fuel Filter Regularly: Replace the fuel filter according to the manufacturer's recommendations (usually every year or every 100 hours of operation).
  • Inspect Fuel Lines and Connections: Regularly inspect the fuel lines and connections for any signs of leaks or damage.
  • Consider Ethanol-Free Fuel: If available in your area, consider using ethanol-free fuel to prevent corrosion of fuel system components.

Frequently Asked Questions

  • How often should I replace my fuel filter? Replace your fuel filter annually or every 100 hours of operation, whichever comes first. A clean fuel filter helps prevent debris from reaching and damaging the fuel pump.

  • Can I use an aftermarket fuel pump instead of an OEM one? Yes, but be sure to choose a reputable brand and check reviews. Aftermarket pumps can be a cost-effective alternative, but quality can vary significantly.

  • What happens if my fuel pump completely fails? Your engine will not start or run. The fuel pump is essential for delivering fuel to the engine, so a complete failure will leave you stranded.

  • Is it hard to replace a Can-Am Commander fuel pump myself? It depends on your mechanical skills and comfort level. If you're not comfortable working on your machine, it's best to have a professional do it.

  • Why does my Commander stall when it gets hot? This could be caused by a failing fuel pump that overheats and shuts down. Heat-related stalling can also be caused by other issues, such as a faulty ignition coil or a clogged fuel filter.

Final Thoughts

Dealing with fuel pump problems on your Can-Am Commander can be frustrating, but understanding the potential causes, symptoms, and solutions empowers you to take action. By following the diagnostic steps outlined above and practicing preventative maintenance, you can keep your fuel pump pumping strong and enjoy many more adventures on the trail. Remember to always prioritize safety when working on your machine and don't hesitate to seek professional help if needed.