Polaris Ranger 570 Fuel Pump Problems - Your Ultimate Diagnostic &

You’re out on the trail, miles from anywhere, and your trusty Ranger 570 starts to sputter. It hesitates, loses power on a climb, or worse, refuses to start altogether. We’ve all been there, and that sinking feeling in your gut is a universal language among riders. It’s a frustrating situation that can ruin a perfect day of work or play.

We promise you that you’re not alone and, more importantly, you have the power to tackle this. Many riders immediately suspect major engine trouble, but very often, the culprit is something you can diagnose and fix right in your own garage: the fuel pump.

This in-depth guide is your new best friend for diagnosing and resolving polaris ranger 570 fuel pump problems. We’ll walk you through identifying the symptoms, performing simple but effective tests, and even replacing the pump yourself. Let’s get your rig running like new again.

Spotting the Telltale Signs: Common Symptoms of a Failing Fuel Pump

A failing fuel pump rarely dies without warning. It usually sends up a few red flags first. Learning to recognize these symptoms is the first step in any good diagnostic process. This is one of the most important polaris ranger 570 fuel pump problems tips we can offer.

Difficulty Starting or No-Start Condition

This is the most obvious sign. Your engine cranks and cranks but won’t fire up. A weak fuel pump can’t build enough initial pressure to deliver fuel to the injectors for combustion. You might notice it starts fine when cold but struggles after it’s been running for a while.

Sputtering, Stalling, and Hesitation

Does your Ranger run rough, especially under acceleration? If it feels like it’s “missing” or about to stall when you hit the gas, the fuel pump might be intermittently failing. It’s delivering just enough fuel to idle but starves the engine when it demands more.

Loss of Power Under Load

Your Ranger might seem fine on flat ground, but as soon as you start climbing a hill or hauling a heavy load, it feels sluggish and weak. This is a classic symptom. The engine needs more fuel under load, and a failing pump simply can’t keep up with the demand, causing a significant drop in performance.

A Whining Noise from the Fuel Tank

A healthy fuel pump makes a faint, brief hum when you first turn the key. A failing pump, however, might produce a loud, continuous whining or buzzing sound. This noise is often caused by a struggling motor inside the pump assembly that is working overtime to build pressure.

Before You Blame the Pump: Essential Pre-Checks to Save Time and Money

Hold on a second! Before you start ordering parts, let’s make sure the fuel pump is actually the villain. Many riders misdiagnose the issue, wasting time and money. Run through these simple checks first to rule out other common culprits.

Check Your Fuel Level: It sounds silly, but it happens. Ensure you have plenty of fresh, clean gasoline in the tank.
Inspect the Fuel Filter: A clogged fuel filter can mimic every single symptom of a bad fuel pump. If it’s been a while, replacing this inexpensive part is a great first step.
Test the Battery: A weak battery can’t provide the necessary voltage for the fuel pump and ignition system to work correctly. Make sure your battery is fully charged and the terminals are clean and tight.
Look for Kinked Fuel Lines: A quick visual inspection can save you a headache. Trace the fuel lines from the tank to the engine, looking for any obvious pinches, kinks, or damage that could restrict flow.

Your Comprehensive Polaris Ranger 570 Fuel Pump Problems Guide to Diagnosis

Okay, you’ve done the pre-checks and the signs still point to the pump. Now it’s time to confirm your suspicion with some targeted tests. This polaris ranger 570 fuel pump problems guide will give you the confidence to pinpoint the issue.

Tool Check: What You’ll Need

Having the right tools makes the job easier and safer. You don’t need a full professional shop, just a few key items:

A basic socket and ratchet set
Screwdrivers (Phillips and flathead)
A fuel pressure test kit (affordable and available at most auto parts stores)
Safety glasses and nitrile gloves
Rags for cleaning up any spills

The “Key-On” Listen Test

This is the simplest test. Go somewhere quiet, put your ear near the fuel tank (usually under the driver’s or passenger’s seat), and turn the ignition key to the “On” position without starting the engine. You should hear a distinct 2-3 second hum as the pump primes the system. No sound at all points to an electrical issue (fuse, relay, or dead pump). A loud, continuous whine points to a struggling pump.

Checking for Fuel Pressure (The Definitive Test)

This is the most reliable way to diagnose common problems with polaris ranger 570 fuel pump problems. A healthy Ranger 570 fuel system should have a specific pressure. While specs can vary slightly by year, you are generally looking for around 39 PSI (+/- 3 PSI). Always check your service manual for the exact spec for your model year.

Locate the fuel rail’s Schrader valve. It looks like a tire valve stem and is usually on the fuel rail near the injector.
Safety first! Put on your safety glasses and have a rag handy. A small amount of fuel may spray out when you connect the gauge.
Attach the fuel pressure gauge to the Schrader valve.
Turn the key to the “On” position to prime the pump. The gauge should jump up to the specified pressure.
If the pressure is low, fails to build, or drops off quickly, you’ve almost certainly found your problem: a bad fuel pump or a severe clog.

Inspecting Fuses and Relays

If you heard no sound during the “key-on” test, the pump might not be getting power. Locate your Ranger’s fuse box (check your owner’s manual for the location). Find the fuse and relay for the fuel pump and inspect them. Swap the fuel pump relay with a known good one (like the horn or lights relay) to see if that solves the problem.

Step-by-Step: How to Replace Your Ranger 570 Fuel Pump Assembly

You’ve confirmed it: the pump is toast. The good news is that replacing it is a very manageable DIY job. This section will show you how to polaris ranger 570 fuel pump problems can be solved with a little patience and the right steps.

Safety First: Prepping Your Workspace

You are working with gasoline, so take this seriously. Work in a well-ventilated area, away from any open flames or sources of sparks (like a water heater). Disconnect the negative terminal on your battery. Have a fire extinguisher nearby, just in case.

Accessing the Fuel Pump Assembly

The fuel pump is located inside the fuel tank. On most Ranger 570 models, you’ll need to lift the bed or remove a seat and access panel to get to the top of the tank. Clean the area around the pump thoroughly to prevent dirt from falling into the tank when you open it.

Removing the Old Pump

Carefully disconnect the electrical connector and the fuel lines from the top of the pump assembly. Be prepared for a small amount of residual fuel to leak out.
The pump is held in by a large plastic lock ring. You may need a special tool, but often you can carefully tap it counter-clockwise with a brass punch and a mallet. Do not use a steel punch, as it can create a spark!
Once the lock ring is off, gently lift the entire fuel pump assembly out of the tank. Be careful not to bend the float arm.

Installing the New Pump Assembly

Installation is the reverse of removal. Make sure the new O-ring or gasket is properly seated to create a good seal. Gently lower the new assembly into the tank, tighten the lock ring, reconnect the fuel lines and electrical connector, and reconnect your battery. Before putting everything back together, cycle the key a few times to prime the new pump and check for leaks.

Proactive Care: Best Practices to Extend Your New Fuel Pump’s Life

Now that you’ve solved the problem, let’s make sure it doesn’t happen again anytime soon. Following this polaris ranger 570 fuel pump problems care guide will maximize the lifespan of your components. The benefits of addressing these problems proactively include better reliability and performance.

Use High-Quality Fuel: Always use fresh, clean fuel from a reputable station. Avoid letting fuel sit in the tank for many months without a stabilizer.
Keep the Tank Above 1/4 Full: The gasoline in the tank actually helps cool the fuel pump motor. Consistently running on a near-empty tank can cause the pump to overheat and fail prematurely.
Regularly Replace Your Fuel Filter: This is cheap insurance. A clogged filter makes the pump work much harder, shortening its life. Follow the service interval in your owner’s manual.
Practice Sustainable Maintenance: A properly maintained fuel system burns fuel more efficiently, which is better for both your wallet and the environment. This is a key part of any eco-friendly polaris ranger 570 fuel pump problems prevention strategy.

Choosing the Right Replacement: OEM vs. Aftermarket Fuel Pumps

When it’s time to buy a new pump, you’ll face a choice: stick with the Polaris Original Equipment Manufacturer (OEM) part or go with an aftermarket option? There are pros and cons to each.

OEM pumps are a guaranteed fit and are built to the exact specifications of your machine. They are often more expensive but offer peace of mind. For many, this is one of the polaris ranger 570 fuel pump problems best practices.

Aftermarket pumps can be significantly cheaper and many reputable brands (like Quantum Fuel Systems or All Balls Racing) offer high-quality alternatives that may even improve on the original design. Just be sure to buy from a trusted seller with good reviews to avoid low-quality knock-offs.

Frequently Asked Questions About Polaris Ranger 570 Fuel Pump Problems

How long should a Polaris Ranger 570 fuel pump last?

There’s no exact answer, but with proper care, a stock fuel pump can last for many years and thousands of miles. Factors like fuel quality, riding habits, and keeping the tank full all play a significant role in its lifespan.

Can I just replace the motor instead of the whole assembly?

Yes, some companies sell just the internal pump motor, which can be a cheaper option. However, it requires disassembling the plastic housing, which can be tricky and risks damaging it. For most DIYers, replacing the entire pump assembly is a simpler and more reliable repair.

What is the most common cause of fuel pump failure?

The most common causes are contamination from bad fuel or debris in the tank, and overheating from consistently running the vehicle on a low fuel level. Electrical issues and simple wear and tear over time are also contributing factors.

My Ranger still won’t start after replacing the fuel pump. What now?

If a new pump didn’t fix the issue, it’s time to look elsewhere. Double-check your electrical connections, fuses, and relays. The next steps would be to check for spark (ignition system) and injector function. If you’re not comfortable with these steps, it may be time to consult a professional mechanic.

Tackling your own repairs is one of the most rewarding parts of owning an off-road vehicle. By following this guide, you’ve not only saved money but also gained valuable knowledge about how your machine works. Now you can get back on the trail with the confidence that your Ranger is running strong. Ride safe and have fun out there!

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Thomas Corle

Founder & Automobile expert at FatBoysOffroad

Automobile expert and off-road enthusiast, sharing in-depth knowledge of vehicles, gear, and adventures. Helping readers make smart decisions and enjoy the thrill of off-roading safely and confidently.