2014 Kia Soul High Pressure Fuel Pump: Complete Replacement and Troubleshooting Guide

If your 2014 Kia Soul with a 1.6L engine is experiencing rough idling, hesitation during acceleration, or a check engine light related to fuel pressure, the high pressure fuel pump is likely the root cause. Unlike the in-tank low pressure pump, this pump is mounted directly on the cylinder head and generates the extreme pressure needed for direct injection. Replacing it is a straightforward job that requires careful attention to fuel system pressure relief, proper torque specs, and clean work habits. Here is everything you need to know about diagnosing, removing, and installing a new high pressure fuel pump on your 2014-2019 Kia Soul.

What the High Pressure Fuel Pump Does

The high pressure fuel pump in your Kia Soul is separate from the electric fuel pump inside the fuel tank. The in-tank pump delivers fuel at low pressure, while the high pressure pump, driven by the engine's camshaft, boosts that pressure to levels required for direct fuel injection . This pump is a mechanical unit, meaning it relies on a cam lobe on the cylinder head to pressurize fuel. When it fails, the engine cannot get the proper fuel pressure for combustion, leading to drivability issues.

Common Symptoms of a Failing High Pressure Fuel Pump

Recognizing the signs early can save you from being stranded or causing further damage. Here are the most common symptoms:

  1. Hard Starting or Extended Cranking: If the pump cannot build enough pressure quickly, the engine will crank longer than normal before firing up.
  2. Rough Idle and Misfires: Inconsistent fuel pressure causes the engine to run unevenly at idle, often accompanied by misfire codes.
  3. Loss of Power Under Acceleration: The engine may feel sluggish or hesitate when you press the gas pedal, especially during highway merging or uphill driving.
  4. Check Engine Light: The vehicle's computer will detect low fuel pressure or fuel trim issues and illuminate the warning light. Common diagnostic trouble codes include P0087 (Fuel Rail Pressure Too Low) and P0191 (Fuel Rail Pressure Sensor Circuit Range/Performance).
  5. Fuel Smell in Oil: A leaking high pressure pump can allow fuel to seep into the engine oil, which you may notice as a strong gasoline odor on the dipstick.

Tools and Parts Needed for the Job

Before starting the repair, make sure you have everything on hand. The job requires a few specialized tools plus standard hand tools.

Required Tools:

  • 10mm socket and ratchet
  • 22mm wrench or crowfoot wrench
  • 19mm wrench
  • Socket extensions
  • Torque wrench (capable of 10-35 Nm range)
  • Fuel line clip remover tool
  • Flat blade screwdriver
  • Razor blade or gasket scraper
  • Safety glasses and gloves
  • Shop rags and drain pan

Parts Needed:

  • New high pressure fuel pump (OEM or high-quality replacement)
  • New high pressure fuel pipe (if the old one is damaged or difficult to remove)
  • New O-rings and seals (often included with the pump)

Step-by-Step High Pressure Fuel Pump Replacement

Follow these steps carefully to remove the old pump and install the new one. Safety is critical because you are working with high-pressure fuel lines.

1. Relieve Fuel System Pressure

This is the most important safety step. Turn the ignition switch OFF and disconnect the negative battery cable . Then, release the residual pressure in the fuel line. On most Kia Soul models, you can do this by removing the fuel pump fuse and cranking the engine until it stalls. When removing the fuel pump fuse, a diagnostic trouble code may be set, which you can clear with a scan tool after completing the repair .

2. Access the High Pressure Fuel Pump

The high pressure fuel pump is located on the cylinder head, near the intake manifold. You may need to remove some engine covers or intake components to access it fully. On the 1.6L engine, the pump is mounted on the driver's side of the cylinder head.

3. Disconnect the Fuel Pressure Control Valve Connector

Unplug the electrical connector from the fuel pressure control valve on top of the pump . Press the locking tab and pull the connector straight off.

4. Disconnect the Low Pressure Fuel Line

Open the low pressure fuel tube clip using a flat blade screwdriver or your fingers. Then, use a clip remover tool to release the low pressure fuel quick-connector . Be prepared for a small amount of fuel to spill—have shop rags ready.

5. Remove the High Pressure Fuel Pipe

This is the rigid metal line that connects the high pressure pump to the fuel rail. Use a 22mm wrench to loosen the flange nut at the pump end, and a 19mm wrench for the connection at the fuel rail . Carefully remove the pipe without bending it. Do not reuse the high pressure pipe if it shows any signs of damage, bending, or if the threads are worn.

6. Remove the High Pressure Fuel Pump

Remove the mounting bolts that hold the pump to the cylinder head. The bolts are typically 10mm or 12mm, depending on the specific model year. Once the bolts are out, carefully pull the pump straight out from the cylinder head. The pump is driven by a cam lobe, so it may require a slight wiggle to free it. Inspect the cam follower on the bottom of the pump for wear—if it is damaged, the camshaft may also need inspection.

7. Clean the Mounting Surface

Use a razor blade or gasket scraper to clean the sealing surface on the cylinder head . Remove any old gasket material, debris, or oil. Be careful not to scratch the surface or let any debris fall into the cylinder head opening.

8. Install the New High Pressure Fuel Pump

Apply a small amount of clean engine oil to the cam follower and the O-ring on the new pump. This helps with initial lubrication and ensures a proper seal. Insert the pump into the cylinder head, aligning it with the mounting holes. Make sure the pump sits flush against the cylinder head.

9. Install the Mounting Bolts

Install the mounting bolts and tighten them to the specified torque. The correct torque for the high pressure fuel pump mounting bolts is 12.8 to 14.7 Nm (1.3 to 1.5 kgf·m, 9.4 to 10.9 lb-ft) . Use a torque wrench to avoid over-tightening, which can damage the pump or the cylinder head.

10. Reconnect the High Pressure Fuel Pipe

Install the high pressure fuel pipe using the special service tool (SST No. 09314-3Q100 or 09314-27130) to ensure proper seating and avoid leaks . Tighten the flange nut at the pump end to 26.5 to 32.4 Nm (2.7 to 3.3 kgf·m, 19.5 to 23.9 lb-ft) . Tighten the fuel pipe function block mounting bolt to 9.8 to 11.8 Nm (1.0 to 1.2 kgf·m, 7.2 to 8.7 lb-ft) .

11. Reconnect the Low Pressure Fuel Line and Electrical Connector

Push the low pressure fuel line onto the pump until you hear it click into place. Pull gently to confirm it is secure. Reconnect the fuel pressure control valve electrical connector.

12. Reconnect the Battery and Prime the System

Reconnect the negative battery cable. Turn the ignition key to the ON position for 5 seconds, then OFF for 5 seconds. Repeat this cycle three times to prime the fuel system without cranking the engine. This helps fill the high pressure pump and fuel rail with fuel.

13. Check for Leaks and Start the Engine

Inspect all connections, especially the high pressure fuel pipe fittings and the pump mounting area, for any fuel leaks. If no leaks are visible, start the engine and let it idle for 2-3 minutes. Recheck for leaks while the engine is running. If you have a scan tool, clear any diagnostic trouble codes that were set during the pressure relief step.

Important Tips for a Successful Repair

  • Always use a torque wrench: The high pressure fuel pipe connections are under extreme pressure. Over-tightening can strip threads, while under-tightening can cause leaks. Stick to the factory specs .
  • Replace the high pressure fuel pipe if necessary: If the old pipe is difficult to remove or shows signs of wear, do not reuse it. A damaged pipe can leak fuel under high pressure, creating a fire hazard.
  • Keep the work area clean: Any dirt or debris that enters the high pressure pump or fuel line can damage the precision components inside the pump and injectors.
  • Check the cam follower: The cam follower on the bottom of the pump contacts the camshaft lobe. If it is worn unevenly, you may have a deeper issue with the camshaft that requires professional inspection.
  • Use a scan tool after repair: Clear any stored DTCs and verify that the fuel pressure sensor is reading within spec. This ensures the pump is working correctly and the system is fully operational.

When to Call a Professional

While this repair is within reach for a DIYer with basic mechanical skills, there are situations where a shop is the better choice. If you encounter rusted or seized fuel line fittings, if the high pressure fuel pipe breaks during removal, or if you are not comfortable working with high-pressure fuel systems, seek professional help. A shop will have the specialized tools and experience to handle unexpected complications without risking damage to the engine or fuel system.

Why a Quality Replacement Pump Matters

Not all fuel pumps are built to the same standard. Using a cheap, low-quality replacement can lead to premature failure, poor performance, and even damage to the fuel injectors or engine. For a critical component like the high pressure fuel pump, investing in a high-quality part is essential for long-term reliability.

KEMSO Fuel Pumps are an excellent choice for your 2014 Kia Soul. Every KEMSO pump is a high-performance, OEM replacement unit, meaning it meets or exceeds the original equipment specifications for flow rate, pressure, and durability. This ensures your engine gets the precise fuel delivery it needs for optimal power and efficiency. KEMSO stands behind their products with a lifetime warranty, giving you peace of mind that your replacement pump is built to last. Whether you drive a sedan, SUV, or motorcycle, KEMSO has a fuel pump engineered to fit your application perfectly. Their pumps are designed to withstand the demands of daily driving, and many models are available at competitive prices. To find the exact KEMSO fuel pump for your 2014 Kia Soul, visit their online store: https://www.kemsoracing.com/

Final Thoughts

Replacing the high pressure fuel pump on a 2014 Kia Soul is a straightforward repair that can restore engine performance, eliminate rough idling, and solve starting issues. The key to success is following the proper fuel pressure relief procedure, using the correct torque specs for all connections, and choosing a quality replacement part. Take your time, work cleanly, and double-check all connections before starting the engine. If you run into unexpected problems, do not hesitate to consult a professional mechanic. With the right approach, your Kia Soul will be back on the road running smoothly in no time.

For the best value and peace of mind, choose a KEMSO fuel pump for your high pressure fuel pump replacement. Visit https://www.kemsoracing.com/ to browse their full selection and find the perfect pump for your vehicle.


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