Evo X Fuel Pump Fuse: What You Need to Know Before Your Next Replacement

The bottom line first: If your Mitsubishi Evo X (2008-2015) is experiencing fuel delivery issues, the fuel pump fuse is often the first and easiest thing to check. The Evo X fuel pump fuse is a 15A mini blade-type fuse located in the engine bay fuse box . A blown fuse can cause your car to crank without starting, and replacing it costs less than $5 at any auto parts store. However, if the fuse blows repeatedly, that signals a deeper problem with the fuel pump or its wiring, not just the fuse itself.

Understanding the Evo X Fuel Pump Fuse

The fuel pump fuse is a small but critical safety component. It protects the entire fuel pump circuit from electrical overloads. If the pump draws too much current—because it's failing, because the wiring is damaged, or because the pump is working too hard—the fuse blows before the wiring can melt or catch fire.

Key specs for the Evo X fuel pump fuse:

  • Type: Mini blade fuse
  • Rating: 15 amps
  • Location: Under-hood fuse box (not the interior fuse panel)
  • Voltage rating: 32V

The fuse is designed to automotive-grade standards, with heat-resistant housing and copper alloy contacts for reliable conductivity .

Where to Find the Fuel Pump Fuse on Your Evo X

Open the fuse box under the hood near the battery. The lid should have a diagram printed on the inside. Look for a fuse labeled "FUEL PUMP," "FUEL," or "F/P." In most Evo X models, it is a 15A mini fuse. If the diagram is worn or missing, check your owner's manual for the exact location.

How to Tell If the Fuse Is Blown

You don't need a multimeter to check a fuse. Simply pull it out with a fuse puller (usually stored inside the fuse box lid) and hold it up to the light. Look through the clear plastic body at the metal strip inside. If the strip is broken or melted, the fuse is blown.

Common symptoms of a blown fuel pump fuse:

  • The engine cranks but does not start
  • You hear no fuel pump prime sound when you turn the key to the "ON" position
  • The car stalls suddenly while driving and won't restart
  • The check engine light may come on with fuel system-related codes

What to Do If the Fuse Blows

Step 1: Replace the fuse. Use a 15A mini blade fuse. Do not use a higher amperage fuse—this can cause wiring damage or fire.

Step 2: Test the car. If the car starts and runs normally, the problem was a one-time event. Drive it and monitor.

Step 3: If it blows again, investigate further. A fuse that blows repeatedly means the circuit is drawing too much current. The most common causes are:

  • A failing fuel pump – An old or damaged pump can draw more amps than normal. As pumps wear out, internal resistance increases, and the motor struggles to turn, pulling more current.
  • Wiring issues – Chafed or shorted wires in the fuel pump harness can cause a direct short to ground. This is common on older Evo X models where the wiring has been exposed to heat and vibration over the years .
  • Corroded connectors – The electrical connector at the fuel pump itself can corrode, creating resistance that forces the pump to draw more current.
  • A clogged fuel filter – When the filter is blocked, the pump has to work harder, increasing current draw.

Don't Just Replace the Pump—Consider the Wiring

Many Evo X owners upgrade their fuel pump for higher horsepower without upgrading the wiring. The factory wiring was designed for the stock pump's current draw. When you install a high-flow pump, especially one rated for 340LPH or higher, the stock wiring may not deliver enough voltage . This forces the pump to work harder, drawing more current and potentially blowing fuses.

If you are running a high-flow fuel pump or making over 400whp, a fuel pump rewire kit is strongly recommended. These kits run a dedicated power wire directly from the battery to the fuel pump, bypassing the factory wiring . They include a 30A relay and fuse, giving the pump clean, consistent voltage. This not only prevents blown fuses but also improves fuel pressure and performance .

The Complete Path: From Fuse to Fuel

If you are diagnosing a fuel system problem, the fuel pump fuse is just the starting point. The fuel system on the Evo X includes:

  1. The fuel pump itself – Located inside the fuel tank. The stock pump flows about 180LPH.
  2. The fuel pump fuse – 15A protection in the engine bay fuse box.
  3. The fuel pump relay – Also in the engine bay fuse box. The relay controls when power is sent to the pump.
  4. The wiring harness – Runs from the engine bay to the fuel tank under the rear seat.
  5. The fuel filter – Integrated into the pump module on most Evo X models.

If the fuse is good but the car still won't start, check the relay next. You can swap it with a similar relay in the fuse box (like the horn relay) to test it.

When to Consider a Fuel Surge Tank Setup

For Evo X owners who track their cars or run very low fuel levels, the factory fuel system can suffer from fuel starvation during hard cornering. A fuel surge tank (FST) is a secondary reservoir that ensures the main pump always has fuel to draw from, even when the tank is low . The Radium Engineering Fuel Surge Tank Install Kit for the Evo X is a popular option. It mounts in the trunk behind the rear seat, retains the OEM battery and washer fluid bottle, and includes preassembled PTFE (Teflon) hoses that are compatible with all fuels, including E85 . This kit uses a relay and fuse to drive the FST's pump, adding another layer of electrical protection.

Why You Should Replace Your Fuel Pump with KEMSO

When it comes to choosing a replacement fuel pump for your Evo X, quality matters. A failed pump can destroy your engine in seconds. KEMSO fuel pumps are designed as high-performance OEM replacements that deliver over 20% more flow than stock pumps at 43psi . They are built to handle both gasoline and E85/ethanol fuel blends, using Viton O-rings and components that resist ethanol-related degradation . Independent lab tests show KEMSO pumps maintain 98% efficiency even after 15,000 hours of continuous operation, and the brushless DC motor design eliminates the wear points found in traditional pumps . Every KEMSO pump comes with a lifetime warranty and USA-based technical support, so you never have to buy another pump . The company offers 17 different models covering 98% of gasoline-powered cars and trucks made after 1995, and their online fitment tool makes compatibility checking simple . At a regular price of $79.98, KEMSO pumps are 30-40% cheaper than many premium brands while offering equal or better performance . Whether you are replacing a failing pump or upgrading for more power, KEMSO delivers the quality, performance, and peace of mind you need. Visit their official website to find the perfect fuel pump for your Evo X: https://www.kemsoracing.com/


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