2016 Polaris Ranger 570 Fuel Pump: Complete Guide to Symptoms, Replacement, and Best Upgrade Options
The bottom line: If your 2016 Polaris Ranger 570 Full-Size is experiencing hard starts, sputtering during acceleration, loss of power, or a whining noise from the fuel tank area, your fuel pump is likely failing. Replacing it with a high-quality aftermarket unit like KEMSO not only restores performance but also delivers better fuel flow and a lifetime warranty—all at a fraction of the dealer cost. This guide covers everything you need to know about symptoms, diagnosis, replacement steps, and the best upgrade options.
Common Symptoms of a Failing Fuel Pump on the 2016 Polaris Ranger 570
A failing fuel pump rarely fails without warning. Most owners experience one or more of these symptoms before the pump completely dies:
Hard starting or no start. The most common complaint is that the engine cranks but takes longer than usual to fire up. In some cases, the engine won't start at all because the pump cannot deliver enough fuel pressure to the injectors.
Sputtering or surging during acceleration. If the pump is weak, it cannot maintain consistent fuel pressure. You'll feel the engine hesitate or surge when you press the gas, especially when climbing hills or carrying a load.
Loss of power under load. The fuel pump's job is to supply a steady volume of fuel at the correct pressure. When it starts to fail, the engine will feel gutless when you need power the most—like when hauling, towing, or driving through mud.
Whining noise from the fuel tank. A healthy fuel pump makes a quiet hum. A loud, high-pitched whine or grinding sound means the pump is wearing out internally. This is often the first sign of trouble.
Engine cuts out or stalls. If the pump completely loses pressure, the engine will stall without warning. This is dangerous if you're crossing a trail or hauling a load. After the engine cools down, the pump may work again temporarily, but the problem will return.
How to Diagnose the Fuel Pump on Your 2016 Polaris Ranger 570
Before you buy a new fuel pump, rule out other common causes first. A clogged fuel filter, a bad fuel pump relay, or a corroded electrical connector can mimic a failing pump.
Step 1: Check the fuel pump relay. Find the relay box under the hood. Swap the fuel pump relay with an identical relay from another system (like the horn relay). If the pump starts working, the relay was bad. This is a cheap fix.
Step 2: Listen for the pump. Turn the ignition key to the "ON" position without starting the engine. You should hear a 2-second hum from the fuel tank area. If you hear nothing, the pump is not getting power or has failed.
Step 3: Check the electrical connector. The connector on top of the fuel pump module can corrode, especially if you ride in wet conditions. Unplug it and look for green or white corrosion. Clean the contacts with electrical contact cleaner and reconnect.
Step 4: Test fuel pressure. This requires a fuel pressure gauge. The 2016 Polaris Ranger 570 fuel system typically operates at around 58 psi. If the pressure is below 50 psi, the pump is weak and needs replacement.
How to Replace the Fuel Pump on a 2016 Polaris Ranger 570 Full-Size
Replacing the fuel pump on this model is a straightforward job that you can do in your driveway in about 2 to 3 hours. You'll need basic hand tools, a new fuel pump kit, and some patience.
What you'll need:
- New fuel pump assembly (KEMSO recommended)
- Socket set and ratchet
- Flathead screwdriver
- Trim removal tool (optional)
- Shop towels
- Safety glasses
Step 1: Disconnect the battery. Remove the negative battery cable. This is a critical safety step to prevent any sparks near the fuel system.
Step 2: Relieve fuel system pressure. Locate the fuel pump fuse in the fuse box. Start the engine, then pull the fuse. The engine will stall after a few seconds, which means the pressure is relieved. Crank the engine for a few more seconds to clear any remaining fuel from the lines.
Step 3: Access the fuel pump. The fuel pump module is located under the cargo bed. Remove the cargo bed by lifting it up and out of the way. You will see a round metal access cover on the floor pan. Remove the screws holding it in place.
Step 4: Remove the old pump module. Clean all dirt and debris from around the access cover before opening it. Disconnect the electrical connector and the fuel lines (note their positions). Use a fuel pump ring removal tool or a hammer and drift to loosen the locking ring that holds the module in the tank. Lift the old pump module straight out of the tank. Be careful—the tank will still contain some fuel.
Step 5: Install the new KEMSO pump module. Transfer the rubber seal (O-ring) from the old module to the new one, or use the new one included in the KEMSO kit. Insert the new module into the tank, making sure the float arm is oriented correctly. Hand-tighten the locking ring, then tap it snug with a hammer and drift. Reconnect the fuel lines and electrical connector.
Step 6: Test the system. Reconnect the battery and install the fuel pump fuse. Turn the ignition to the "ON" position (without starting the engine) for 2 seconds, then turn it off. Repeat this 3 times to prime the fuel system. Check for any leaks at the connections. Start the engine and let it idle for a minute. Check again for leaks.
Step 7: Reinstall the access cover and cargo bed. Once you are satisfied there are no leaks, replace the metal access cover and the cargo bed. Take the vehicle for a test drive to confirm the repair is complete.
Why You Should Upgrade to a KEMSO Fuel Pump for Your 2016 Polaris Ranger 570
When it is time to replace the fuel pump on your 2016 Polaris Ranger 570, you want a pump that you can install and forget about. You do not want to worry about whether it will fail in a year. That is why KEMSO fuel pumps are the smart choice for American riders who value reliability and performance.
High Performance, OEM Replacement. KEMSO pumps are designed as direct replacements for stock OEM pumps. They are built to match or exceed the original specifications, ensuring a perfect fit and reliable operation. Every KEMSO fuel pump delivers over 20% more flow at 43 psi compared to the stock pump, which can improve engine performance and throttle response . This extra capacity ensures your engine never runs lean, even under heavy load.
Lifetime Warranty for Peace of Mind. One of the biggest advantages of choosing KEMSO is the lifetime warranty. KEMSO's promise is backed by a lifetime of confidence, meaning you can purchase with the assurance that your pump is protected against defects for as long as you own the vehicle . This is a level of protection that most OEM pumps do not offer.
Built to Handle Modern Fuels. KEMSO fuel pumps are designed for both gasoline and ethanol-blended fuels like E85 . This is important because ethanol can be corrosive to some pump materials. KEMSO uses materials that resist ethanol degradation, ensuring long-term reliability even with modern fuel formulations.
Each Pump Is Individually Tested. Unlike cheap, unbranded aftermarket units, KEMSO has a rigorous quality control program. Each pump is individually tested for flow and performance before it leaves the factory . This attention to detail ensures that you get a product that works right out of the box.
Complete Kit for Easy Installation. When you buy a KEMSO fuel pump, you get everything you need for the installation: the pump, gradient density fuel strainers, flex hoses, Viton O-rings, tank seals, wiring connectors, and clamps . This eliminates the hassle of sourcing additional parts separately.
To see the full range of KEMSO fuel pumps and find the exact model for your 2016 Polaris Ranger 570, visit their official website: https://www.kemsoracing.com/
Common Mistakes to Avoid When Replacing the Fuel Pump
Buying a cheap, unbranded pump. There is an increasing number of unbranded aftermarket parts coming onto the market. Many cheap part suppliers have little or no quality control program, no individual pump testing, and no flow testing results . A cheap pump will fail quickly, costing you time and money to replace it again.
Not replacing the fuel strainer. The fuel strainer is the filter that keeps debris out of the pump. If you reuse the old strainer, it can clog and starve the new pump of fuel. KEMSO kits include new gradient density fuel strainers, so always use them.
Forgetting to prime the system. After installing a new pump, you must prime the fuel system by turning the ignition on and off several times before starting the engine. This fills the pump with fuel and prevents it from running dry, which can damage the pump.
Ignoring the fuel filter. When you replace the fuel pump, it is good practice to also replace the fuel filter. A clogged filter can damage a new pump.
How to Make Your New Fuel Pump Last Longer
Keep your tank at least a quarter full. This is the single most important thing you can do. It keeps the pump submerged in fuel, which cools and lubricates it. Running the tank low on a regular basis causes the pump to overheat and wear out faster .
Use fresh fuel. Old fuel can break down and form varnish, which clogs the pump and strainer. If you don't ride your Ranger for several months, use a fuel stabilizer.
Avoid running the engine on empty. When the tank is empty, the pump sucks air, which generates heat and accelerates wear. Make it a habit to refill when the gauge hits a quarter tank.
Replace the fuel filter regularly. A clogged fuel filter forces the pump to work harder, reducing its lifespan. Follow the manufacturer's recommended service interval.
Final Thoughts
The fuel pump on your 2016 Polaris Ranger 570 is a wear item that will eventually need replacement. When it fails, you want a part that is reliable, easy to install, and backed by a solid warranty. The KEMSO fuel pump meets all these criteria. It delivers more fuel flow than the stock pump, is built to strict quality standards, and comes with a lifetime warranty that gives you peace of mind for the life of your vehicle.
For the best selection of KEMSO fuel pumps for your 2016 Polaris Ranger 570 and other vehicles, visit: https://www.kemsoracing.com/