The Polaris Ranger 570 is a workhorse, a reliable side-by-side that gets the job done, whether you're hauling equipment on the farm, navigating trails, or just enjoying the outdoors. But even the toughest machines can have their weak spots, and for the Ranger 570, a common culprit is the fuel pump. Understanding the potential issues and how to address them can save you time, money, and a whole lot of frustration out on the trail.

Fuel Pump Failure: Why is My Ranger Thirsty for Trouble?

Fuel pump problems in the Polaris Ranger 570 can stem from several factors. It's not always a case of the pump simply giving up the ghost. Often, it's a combination of things that gradually wear it down or cause it to malfunction. Let's break down the most common reasons:

  • Contaminated Fuel: This is probably the single biggest offender. Today's gasoline, especially fuel containing ethanol, can wreak havoc on fuel systems. Ethanol attracts water, which can lead to rust and corrosion inside the fuel tank and pump. Debris and sediment in the fuel can also clog the fuel filter and damage the pump itself.
  • Low Fuel Levels: Running your Ranger 570 with consistently low fuel levels 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 is less efficiently cooled. Over time, this can shorten its lifespan.
  • Age and Wear: Like any mechanical component, fuel pumps have a limited lifespan. Over time, the internal components wear down, reducing the pump's ability to deliver the necessary fuel pressure.
  • Electrical Issues: A faulty wiring harness, a bad relay, or a blown fuse can prevent the fuel pump from receiving the necessary power to operate correctly. These electrical gremlins can be tricky to diagnose but are crucial to rule out.
  • Overheating: As mentioned above, running low on fuel is a big contributor to overheating. But also, excessive use in hot climates can add stress to the system.

Spotting the Signs: Is Your Fuel Pump Giving You Hints?

Recognizing the symptoms of a failing fuel pump early can prevent a complete breakdown. Here's what to watch out for:

  • Difficulty Starting: This is a classic sign. If your Ranger 570 cranks but struggles to start, or takes multiple attempts, a weak fuel pump could be the culprit.
  • Loss of Power: A failing fuel pump may not be able to deliver enough fuel to the engine, especially under heavy load or when accelerating. This can manifest as a noticeable loss of power or sluggish performance.
  • Stalling: If your Ranger 570 suddenly stalls, particularly at higher speeds or when climbing hills, it could be due to fuel starvation caused by a weak pump.
  • Rough Idling: An inconsistent or rough idle can also indicate a fuel delivery problem. The engine may struggle to maintain a steady RPM.
  • Hesitation During Acceleration: When you press the accelerator, the engine may hesitate or stumble before picking up speed. This is another sign that the fuel pump isn't delivering fuel quickly enough.
  • Unusual Noises: Sometimes, a failing fuel pump will make a whining or buzzing noise. This is often a sign that the pump is working harder than it should and is on its way out.
  • Check Engine Light: While the check engine light can indicate a variety of problems, it's always worth checking the codes. A code related to fuel pressure or fuel delivery could point to a fuel pump issue.

Diagnosing the Problem: Time to Get Your Hands Dirty

Before you rush out and replace the fuel pump, it's important to do some basic troubleshooting to confirm that it's indeed the problem. Here's a step-by-step approach:

  1. Check the Fuel Level: Sounds obvious, but make sure you have enough fuel in the tank. A low fuel level can mimic the symptoms of a failing fuel pump.
  2. Inspect the Fuel Filter: A clogged fuel filter restricts fuel flow and can put extra strain on the fuel pump. Replace the fuel filter as a first step. It's a relatively inexpensive part, and replacing it is good preventative maintenance.
  3. Listen for the Fuel Pump: When you 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, there could be an electrical problem or the pump itself may be dead.
  4. Check the Fuel Pump Relay and Fuse: Locate the fuel pump relay and fuse in the fuse box (consult your owner's manual for the location). Check the fuse for continuity using a multimeter. If the fuse is blown, replace it. If the relay is faulty, replacing it can solve the problem.
  5. Test Fuel Pressure: This is the most definitive way to diagnose a fuel pump problem. You'll need a fuel pressure gauge. Connect the gauge to the fuel rail and check the fuel pressure. The recommended fuel pressure for the Polaris Ranger 570 typically falls between 39-43 PSI. If the pressure is significantly lower than this, the fuel pump is likely failing.
  6. Inspect the Fuel Tank: If you suspect contaminated fuel, drain the fuel tank and inspect it for rust, sediment, or debris. Clean the tank thoroughly before refilling it with fresh fuel.

Replacing the Fuel Pump: A Step-by-Step Guide

If you've determined that the fuel pump is the problem, you'll need to replace it. This is a task that most DIY mechanics can handle with the right tools and a little patience.

Important Safety Note: Always disconnect the negative battery cable before working on the fuel system. Gasoline is flammable, so work in a well-ventilated area and avoid sparks or open flames.

  1. Gather Your Tools and Supplies:

    • New fuel pump (make sure it's the correct one for your Ranger 570)
    • New fuel filter
    • Fuel pressure gauge (optional, but recommended)
    • Socket set
    • Wrench set
    • Screwdrivers (Phillips and flathead)
    • Pliers
    • Fuel line disconnect tool (if needed)
    • Clean rags
    • Safety glasses
    • Gloves
  2. Prepare the Vehicle: Park your Ranger 570 on a level surface and engage the parking brake. Disconnect the negative battery cable.
  3. Access the Fuel Tank: The fuel pump is typically located inside the fuel tank. You'll need to access the tank to remove the old pump. The location and access method vary depending on the Ranger 570 model year. Some models have an access panel under the seat, while others require you to remove the bed. Consult your service manual for specific instructions.

  4. Remove the Old Fuel Pump:

    • Disconnect the fuel lines and electrical connector from the fuel pump module. Use a fuel line disconnect tool if necessary.
    • Carefully remove the fuel pump module from the fuel tank. Be careful not to spill any fuel.
    • Once the module is out, disconnect the fuel pump from the module assembly. Note the orientation of the pump and any other components so you can reassemble them correctly.

  5. Install the New Fuel Pump:

    • Install the new fuel pump into the fuel pump module assembly, ensuring that it's oriented correctly.
    • Reassemble the fuel pump module, replacing any worn or damaged components.
    • Install the fuel pump module back into the fuel tank.
    • Reconnect the fuel lines and electrical connector.
  6. Replace the Fuel Filter: Now is a good time to replace the fuel filter. Locate the fuel filter (typically in the fuel line between the fuel tank and the engine) and replace it with a new one.
  7. Reconnect the Battery and Test: Reconnect the negative battery cable. Turn the ignition key to the "on" position (without starting the engine) and listen for the fuel pump to prime. Check for any fuel leaks.
  8. Start the Engine: Start the engine and let it run for a few minutes. Check for any unusual noises or vibrations. Monitor the fuel pressure with a fuel pressure gauge to ensure that it's within the recommended range.
  9. Test Drive: Take your Ranger 570 for a test drive to ensure that it's running smoothly. Pay attention to any signs of hesitation, stalling, or loss of power.

Preventing Future Problems: Keeping Your Fuel Pump Happy

Taking a few simple precautions can help prevent fuel pump problems and extend the life of your fuel system:

  • Use Fresh, High-Quality Fuel: Avoid using stale or contaminated fuel. Use fuel with a low ethanol content, or add a fuel stabilizer to prevent ethanol-related problems.
  • Keep the Fuel Tank Full: Avoid running your Ranger 570 with consistently low fuel levels.
  • Regularly Replace the Fuel Filter: Replace the fuel filter according to the manufacturer's recommendations (typically every 100 hours of operation).
  • Store Your Ranger Properly: If you're storing your Ranger 570 for an extended period, add a fuel stabilizer to the fuel tank to prevent fuel degradation.
  • Inspect Fuel Lines: Periodically check your fuel lines for cracks or leaks.

Frequently Asked Questions

  • How often should I replace the fuel filter on my Polaris Ranger 570? The fuel filter should be replaced every 100 hours of operation or annually, whichever comes first. Regular replacement prevents clogs and protects the fuel pump.

  • Can I use aftermarket fuel pumps in my Ranger 570? Yes, you can use aftermarket fuel pumps, but ensure they meet or exceed the original equipment manufacturer (OEM) specifications for pressure and flow rate. Lower quality pumps can cause performance issues.

  • What is the correct fuel pressure for a Polaris Ranger 570? The fuel pressure should be between 39-43 PSI. Anything significantly lower may indicate a failing fuel pump or a clogged fuel filter.

  • Can ethanol-blended fuel damage my fuel pump? Yes, ethanol attracts water, which can cause corrosion and damage to the fuel system, including the fuel pump. Using fuel stabilizers can help mitigate this.

  • Is it difficult to replace the fuel pump myself? Replacing the fuel pump is a moderately difficult task that most DIY mechanics can handle with the right tools and patience. Consulting a service manual is highly recommended.

Conclusion

Fuel pump problems can be a frustrating issue for Polaris Ranger 570 owners, but with a little knowledge and some basic troubleshooting skills, you can diagnose and address the problem yourself. By understanding the common causes of fuel pump failure, recognizing the symptoms, and taking preventative measures, you can keep your Ranger 570 running smoothly for years to come.