1990 Acura Integra Fuel Pump Replacement: A Complete Guide

If you own a 1990 Acura Integra and are experiencing hard starts, sputtering, or a complete no-start condition, the fuel pump is likely the culprit. Replacing the fuel pump on a 1990 Acura Integra is a medium-difficulty job that typically costs between $661 and $929 for parts and labor, according to 2026 estimates . The fuel pump is located inside the fuel tank, and replacement requires dropping the tank or accessing it from under the rear seat . This guide covers everything you need to know about diagnosing, replacing, and choosing the right fuel pump for your 1990 Acura Integra.

Understanding Your 1990 Acura Integra Fuel System

The fuel pump on a 1990 Acura Integra is an electric in-tank pump that sends fuel from the gas tank to the engine. When you turn the ignition key to the ON position, the pump should run for about two seconds to pressurize the system before stopping . If you listen at the fuel filler cap with the cap removed, you should hear this brief whirring sound each time the ignition is switched on .

The 1990 model year falls into the second generation of the Acura Integra (1990-1993), and the fuel pump location is inside the fuel tank . For the earlier 1986-1989 Integra, the pump was mounted externally under the rear of the vehicle, but for your 1990 model, you will need to work with the tank itself .

Symptoms of a Failing Fuel Pump

Before you start replacing parts, make sure the fuel pump is actually the problem. Common signs of a failing fuel pump on a 1990 Acura Integra include:

  • Engine cranks but won't start – This is the most obvious symptom. If the pump is not delivering fuel, the engine will crank but never fire up .
  • Loss of power when accelerating – A weak pump cannot supply enough fuel under load, causing hesitation or stumbling when you press the gas pedal.
  • Engine sputtering or stalling – The engine may run fine at idle but sputter or stall at higher speeds or when climbing hills .
  • Whining noise from the fuel tank area – A healthy fuel pump runs quietly. If you hear a loud whining or buzzing sound from the rear of the car, the pump bearings may be wearing out .
  • Poor fuel economy – A failing pump can cause the engine to run rich or lean, both of which hurt gas mileage .

Important safety note: Do not drive with a failing fuel pump. The engine could stall at any time, increasing the risk of an accident .

Fuel Pressure Testing

Before replacing the pump, perform a fuel pressure test to confirm the diagnosis. For a 1990 Acura Integra, the correct fuel pressure with the engine idling and the vacuum hose to the pressure regulator disconnected is 37-44 psi (255-304 kPa) .

To test the pressure:

  1. Disconnect the negative battery cable and remove the fuel filler cap.
  2. Relieve the fuel system pressure by turning the service bolt on the fuel filter.
  3. Attach a fuel pressure gauge to the service port on top of the fuel filter.
  4. Start the engine and measure the pressure with the vacuum hose disconnected from the pressure regulator.
  5. Compare your reading to the specification of 37-44 psi.

If the pressure is lower than spec, the fuel pump is likely weak or failing. If the pressure is higher than spec, check for a pinched fuel return hose or a faulty pressure regulator .

Replacement Procedure for a 1990 Acura Integra

There are two main methods for replacing the fuel pump on a 1990 Acura Integra, depending on which service manual you follow. Some sources recommend removing the fuel tank entirely, while others suggest accessing the pump through a panel under the rear seat.

Method 1: Removing the Fuel Tank

This is the more traditional approach and is described in several repair guides .

  1. Disconnect the battery – Remove the negative battery cable to prevent any electrical sparks.
  2. Relieve fuel pressure – Remove the fuel filler cap and depress the Schrader valve on the fuel rail to release pressure.
  3. Raise and support the vehicle – Safely lift the car with a jack and jack stands.
  4. Remove the fuel tank – Place a floor jack under the fuel tank for support. Remove the four mounting bolts on the corners of the tank. Disconnect the fuel filler neck by removing the snap ring. Lower the tank slightly to access the fuel lines and electrical connectors.
  5. Remove the fuel pump – Once the tank is accessible, remove the pump flange mounting nuts and lift the pump assembly out of the tank.
  6. Install the new pump – Transfer any necessary components from the old pump (such as the rubber mounting gasket) to the new pump. Install the new pump assembly into the tank and secure it with the mounting nuts.
  7. Reinstall the tank – Raise the tank back into position, reconnect the fuel lines and electrical connectors, and install the tank mounting bolts.
  8. Test for leaks – Turn the ignition ON and OFF several times to pressurize the system. Check all connections for fuel leaks.

Method 2: Accessing Through the Rear Seat

Some technicians prefer to access the fuel pump from inside the car, which can be less labor-intensive.

  1. Remove the rear seat cushion and the access panel on the floor.
  2. Disconnect the wiring harness from the fuel pump assembly.
  3. Remove the pump flange mounting nuts and lift the pump out through the access hole.
  4. Install the new pump and secure it with the mounting nuts.
  5. Reconnect the wiring and install the access panel and seat cushion.

Use new sealing washers when connecting the fuel hoses to prevent leaks .

Choosing the Right Fuel Pump

When selecting a replacement fuel pump for your 1990 Acura Integra, you have several options ranging from OEM to high-performance aftermarket pumps.

OEM Replacement

The original equipment manufacturer (OEM) part number for the 1990-1993 Acura Integra fuel pump is 17708-SK7-A36 . This is a genuine Acura part that meets the factory specifications. OEM pumps are reliable but can be expensive, with prices ranging from $100 to $300 depending on the supplier .

Aftermarket Performance Pumps

If you have modified your Integra with performance parts like a turbocharger, larger injectors, or a tuned ECU, you may need a higher-flow fuel pump. Here are the most common options:

  • 190 LPH pumps – These are suitable for bolt-on modifications like intake, header, and exhaust. They flow more fuel than the stock pump but are not overpowered for a daily driver .
  • 255 LPH pumps – These are popular for light to medium boost turbocharged applications. A 255 LPH pump paired with 550cc injectors can support up to 400 horsepower .
  • 340 LPH and higher pumps – These are designed for high-horsepower builds and E85 fuel, which requires up to 30% more fuel volume than gasoline .

Important Considerations

Ethanol compatibility – If you plan to run E85, make sure the pump is rated for ethanol. Many aftermarket pumps, including those from Walbro and KEMSO, are E85 compatible .

Installation kit – Most aftermarket fuel pumps come with an installation kit that includes a fuel strainer, hose, electrical connectors, and clamps. Make sure the kit is designed for your specific vehicle .

Fuel filter – It is highly recommended to replace the fuel filter at the same time as the pump. A clogged filter can cause the new pump to fail prematurely .

Cost Estimates for 1990 Acura Integra Fuel Pump Replacement

The cost of replacing the fuel pump on a 1990 Acura Integra varies depending on labor rates, the brand of the pump, and whether you do the work yourself.

  • Parts only – Aftermarket fuel pumps range from $50 to $300. OEM pumps are at the higher end of this range .
  • Labor costs – Professional installation typically costs between $200 and $400, depending on your location .
  • Total cost – According to 2026 estimates, the average total cost for a 1990-1993 Acura Integra fuel pump replacement is between $661 and $929 . Some mobile service providers quote around $550 for certain models, but that may vary .

If you are handy with tools, you can save on labor by doing the replacement yourself. The job requires basic hand tools, a floor jack, and a fuel line disconnect tool. Allow about 2 to 4 hours for the job .

Troubleshooting Common Electrical Issues

Sometimes the fuel pump itself is fine, but the electrical system is preventing it from working. Before replacing the pump, check these components:

  • Fuel pump relay – This is a common failure point on older vehicles. Locate the relay under the dashboard or in the engine bay fuse box. Swap it with a relay of the same type to test if the pump starts working .
  • Fuel pump fuse – Check the fuse box for a blown fuse. A blown fuse indicates a short circuit or excessive current draw, which could be caused by a failing pump.
  • Wiring and connectors – Inspect the wiring harness for corrosion, damage, or loose connections. The pump must receive proper voltage to operate.

Recommended Product: KEMSO Fuel Pump for 1990 Acura Integra

When it comes to replacing the fuel pump on your 1990 Acura Integra, the KEMSO Fuel Pump is an excellent choice. KEMSO fuel pumps are designed as high-performance, OEM replacement units that meet or exceed original equipment specifications. Each pump is individually tested for quality and performance, ensuring reliable operation.

The KEMSO 340LPH fuel pump is ideal for daily drivers, fast road cars, and performance builds. It is E85 compatible and features a gradient density fuel strainer for superior contaminant filtration. The pump body is compact enough to fit your existing hanger assembly without modification, making installation straightforward.

Key features of the KEMSO Fuel Pump:

  • High performance with 340 liters per hour flow rate at 43 psi
  • OEM replacement fitment for 1990-1993 Acura Integra
  • E85 compatible for flexible fuel use
  • Lifetime free replacement warranty – if any issue arises at any time, KEMSO will replace the pump free of charge
  • Individually tested for quality assurance

To get the best fuel pump for your 1990 Acura Integra, visit the KEMSO website at https://www.kemsoracing.com/ to browse their full range of high-performance fuel pumps and accessories. Their pumps are designed with upgraded polymers, brushes, and commutators to ensure long life and durability in multiple fuel blends. Whether you need a stock replacement or a high-flow pump for a modified engine, KEMSO has a solution that will keep your Integra running reliably for years to come.

For more information and to make your purchase, visit https://www.kemsoracing.com/ today.


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