Let's face it, you're here because your Arctic Cat 700 EFI isn't running like it should, and the fuel pump is a prime suspect. A sputtering engine, difficulty starting, or even a complete refusal to run can all point to fuel delivery issues, and a failing fuel pump can quickly turn a fun day on the trails into a frustrating experience. We’re here to help you troubleshoot, understand the potential causes, and explore solutions to get your ATV back on the road (or trail) where it belongs.

Is Your Arctic Cat 700 EFI Fuel Pump Giving You the Blues? Common Symptoms to Watch For

Identifying a fuel pump problem early can save you a lot of headaches down the line. Here's what to look out for:

  • Hard Starting: This is often the first sign. The engine cranks longer than usual before firing up. This happens because the pump isn't building pressure quickly enough.
  • Engine Sputtering or Stalling: A weak fuel pump may struggle to maintain consistent fuel pressure, especially under load. This can lead to sputtering, hesitation, or even complete engine stall, particularly when climbing hills or accelerating.
  • Loss of Power: If your ATV feels sluggish and lacks its usual pep, a failing fuel pump could be the culprit. The engine isn't getting the fuel it needs to perform optimally.
  • Increased Engine Temperature: While not a direct symptom, a lean fuel condition (caused by a weak pump) can lead to increased engine temperatures. Keep an eye on your temperature gauge.
  • Fuel Pump Noise: A healthy fuel pump operates relatively quietly. A failing pump might whine loudly, gurgle, or make other unusual noises. Listen closely when you turn the key.
  • Intermittent Problems: Sometimes, the problem comes and goes. The fuel pump might work fine one day and then act up the next. This can make diagnosis tricky, but it's a strong indicator of a failing component.

What's Causing the Fuel Pump to Fail? Common Culprits

Understanding the potential causes can help you prevent future problems. Here are some of the most common reasons why Arctic Cat 700 EFI fuel pumps fail:

  • Contaminated Fuel: This is a big one. Dirt, debris, and water in the fuel tank can clog the fuel pump filter and damage the pump itself. Always use clean, fresh fuel and consider using a fuel stabilizer, especially during storage.
  • Old Age: Like any mechanical component, fuel pumps have a lifespan. Over time, the internal components wear out, leading to reduced performance and eventual failure.
  • Overheating: Running the ATV in extremely hot conditions or consistently running the fuel tank low can cause the fuel pump to overheat. The fuel helps cool the pump, so keeping the tank relatively full is beneficial.
  • Electrical Issues: Problems with the wiring harness, relay, or fuse can prevent the fuel pump from receiving the proper voltage, leading to premature failure.
  • Running the Tank Dry: Repeatedly running the fuel tank completely dry can put excessive strain on the fuel pump. The pump relies on the fuel for lubrication and cooling.
  • Ethanol in Fuel: Ethanol can absorb water, exacerbating fuel contamination problems. It can also degrade rubber and plastic components in the fuel system over time.

Diagnosing the Problem: Time to Get Your Hands Dirty (Figuratively Speaking)

Before you rush out and buy a new fuel pump, it's important to confirm that the pump is indeed the problem. Here's a basic troubleshooting process:

  1. Check the Fuel Level: Seems obvious, but make sure you have enough fuel in the tank!
  2. Listen for the Fuel Pump: When you turn the 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 anything, that's a red flag.
  3. Check the Fuel Pump Fuse and Relay: Consult your owner's manual to locate the fuel pump fuse and relay. Check the fuse for continuity with a multimeter. If the fuse is blown, replace it. If it blows again immediately, there's likely a short circuit in the fuel pump wiring. Swap the fuel pump relay with another identical relay in the fuse box. If the problem goes away, the relay is faulty.
  4. Check the Fuel Filter: A clogged fuel filter can restrict fuel flow and put extra strain on the fuel pump. The fuel filter is often integrated into the fuel pump assembly. Replacing the filter regularly is a good preventative measure.
  5. Test Fuel Pressure: This requires a fuel pressure gauge. Connect the gauge to the fuel rail and check the pressure with the key on and the engine running. Compare the reading to the specifications in your service manual. Low fuel pressure indicates a problem with the fuel pump, fuel pressure regulator, or a clogged fuel filter.
  6. Inspect the Fuel Pump Wiring: Check for any damaged, corroded, or loose wires in the fuel pump wiring harness. Repair or replace any damaged wires.
  7. Fuel Pump Voltage Test: Use a multimeter to check the voltage at the fuel pump connector when the key is in the "on" position. You should see close to battery voltage (around 12 volts). Low voltage indicates a problem with the wiring or the fuel pump relay.

Important Safety Note: When working with fuel, always disconnect the negative battery cable and work in a well-ventilated area. Avoid open flames or sparks.

Replacing the Fuel Pump: A Step-by-Step Guide (General Overview)

Replacing a fuel pump can be a moderately challenging task, but it's definitely doable for a mechanically inclined individual. Always consult your service manual for specific instructions for your Arctic Cat 700 EFI model. This is a general overview:

  1. Gather Your Tools: You'll need wrenches, sockets, screwdrivers, pliers, fuel line disconnect tools (if necessary), a new fuel pump assembly, a fuel filter (if separate), and safety glasses.
  2. Disconnect the Battery: Disconnect the negative battery cable to prevent any electrical shorts.
  3. Drain the Fuel Tank (Ideally): While not always necessary, draining the fuel tank makes the job much cleaner and safer. Use a siphon or a fuel pump to remove the fuel.
  4. Access the Fuel Pump: The fuel pump is usually located inside the fuel tank. You'll need to remove the seat, body panels, and any other components that are blocking access to the fuel tank.
  5. Disconnect the Fuel Lines and Electrical Connector: Carefully disconnect the fuel lines and electrical connector from the fuel pump assembly. Be prepared for some fuel spillage. Use a rag to soak up any spilled fuel.
  6. Remove the Fuel Pump Assembly: Remove the fuel pump assembly from the fuel tank.
  7. Install the New Fuel Pump Assembly: Install the new fuel pump assembly into the fuel tank. Make sure the fuel lines and electrical connector are securely connected.
  8. Reassemble Everything: Reinstall the fuel tank, body panels, seat, and any other components that you removed.
  9. Reconnect the Battery: Reconnect the negative battery cable.
  10. Test the Fuel Pump: Turn the key to the "on" position and listen for the fuel pump to prime. Start the engine and check for any fuel leaks.

Important Tip: When installing the new fuel pump, be sure to use a new fuel tank seal or O-ring to prevent fuel leaks.

Preventing Future Fuel Pump Problems: Proactive Maintenance

Prevention is always better than cure. Here's how to keep your Arctic Cat 700 EFI fuel pump healthy:

  • Use Clean, Fresh Fuel: This is the single most important thing you can do. Buy fuel from reputable gas stations and avoid using old or contaminated fuel.
  • Use a Fuel Stabilizer: Add a fuel stabilizer to the fuel tank, especially when storing the ATV for extended periods. This will help prevent fuel from breaking down and forming deposits.
  • Keep the Fuel Tank Relatively Full: Running the fuel tank low can cause the fuel pump to overheat.
  • Replace the Fuel Filter Regularly: Follow the manufacturer's recommendations for fuel filter replacement. A clean fuel filter will prevent dirt and debris from damaging the fuel pump.
  • Inspect the Fuel System Regularly: Check the fuel lines, fuel pump wiring, and fuel tank for any signs of damage or leaks.
  • Consider Ethanol-Free Fuel: If available, using ethanol-free fuel can help prevent fuel system problems caused by ethanol.

Aftermarket Upgrades: Are They Worth It?

There are aftermarket fuel pumps available for the Arctic Cat 700 EFI. These pumps often offer higher flow rates and improved durability. Whether they're worth it depends on your needs. If you've modified your engine or plan to do so, an upgraded fuel pump might be necessary to provide enough fuel. For a stock engine, a high-quality OEM replacement fuel pump is usually sufficient. Research the brands and read reviews before making a purchase.

Frequently Asked Questions

  • How long does an Arctic Cat 700 EFI fuel pump typically last? The lifespan varies, but generally, you can expect 5-7 years or more with proper maintenance. Factors like fuel quality and operating conditions affect longevity.

  • Can I rebuild my fuel pump instead of replacing it? Rebuilding is sometimes possible, but it’s often more cost-effective and reliable to replace the entire fuel pump assembly. Rebuild kits may not include all necessary parts.

  • How much does it cost to replace an Arctic Cat 700 EFI fuel pump? The cost varies depending on the brand and quality of the fuel pump. Expect to pay between $100 and $300 for the part, plus labor if you're having a mechanic do the work.

  • What is the fuel pressure supposed to be on an Arctic Cat 700 EFI? Consult your service manual for the specific fuel pressure specifications for your model year. It's typically around 43 PSI.

  • Can a bad fuel pump cause my ATV to backfire? Yes, a lean fuel condition caused by a weak fuel pump can lead to backfiring. The engine isn't getting enough fuel, causing incomplete combustion.

Conclusion

Fuel pump problems in your Arctic Cat 700 EFI can be frustrating, but with a little knowledge and troubleshooting, you can often diagnose and resolve the issue yourself. Remember to prioritize clean fuel, regular maintenance, and careful inspection to keep your fuel pump running strong for years to come. If you're not comfortable tackling the repair yourself, don't hesitate to seek help from a qualified mechanic.