1990 Acura Integra Fuel Pump: The Complete Guide to Symptoms, Diagnosis, and Replacement
If you own a 1990 Acura Integra and your car is struggling to start, hesitating during acceleration, or making a whining noise from the rear of the vehicle, the fuel pump is likely failing and needs to be replaced. The fuel pump on the 1990-1993 Acura Integra is located inside the fuel tank, and it is a critical component that delivers pressurized fuel from the tank to the engine. When it fails, the engine simply will not run properly or at all. This guide covers everything you need to know about the 1990 Acura Integra fuel pump, including symptoms of failure, how to diagnose the problem, replacement options, and step-by-step installation instructions.
Symptoms of a Failing Fuel Pump on a 1990 Acura Integra
A bad fuel pump can cause a range of drivability issues. The most common symptoms include:
1. Engine Cranks But Will Not Start. This is the most obvious sign. If you turn the key and the engine cranks over but never fires up, the fuel pump may not be delivering fuel. You can verify this by listening at the fuel filler neck. When you turn the ignition to the ON position, the pump should run for about 2 seconds before stopping. If you hear nothing, the pump is dead or not receiving power.
2. Long Cranking Time Before the Engine Starts. A weak or failing pump cannot build up enough fuel pressure quickly. You may need to crank the engine for 5-10 seconds before it finally starts. This is a classic early warning sign of fuel pump failure.
3. Loss of Power and Hesitation. When accelerating, especially uphill or under load, the engine may hesitate, stumble, or feel like it is running out of gas. This happens because the pump cannot maintain the required fuel pressure under high demand.
4. Engine Sputtering or Stalling. A failing fuel pump can cause the engine to sputter at highway speeds or stall unexpectedly. After stalling, the car may restart after sitting for a few minutes, as the pump cools down and regains some function.
5. Whining Noise From the Fuel Tank. A healthy fuel pump makes a quiet hum. If you hear a loud, high-pitched whining or buzzing sound coming from the rear of the car (near the fuel tank), the pump is likely worn out and working harder than it should.
6. Poor Fuel Economy. If the pump is failing and causing the engine to run rich or lean, you may notice a significant drop in gas mileage.
Fuel Pressure Specifications for the 1990 Acura Integra
Before you replace the pump, it is a good idea to test the fuel pressure to confirm the diagnosis. The correct fuel pressure for the 1990-1993 Acura Integra is 37-44 psi (255-304 kPa) at idle with the vacuum hose to the pressure regulator disconnected.
To test the pressure, you will need a fuel pressure gauge. Connect the gauge to the service port on the fuel filter or fuel rail. Start the engine and compare the reading to the specification. If the pressure is lower than 37 psi, the fuel pump is weak or the filter is clogged. If the pressure is higher than 44 psi, the pressure regulator may be faulty.
Location of the Fuel Pump on the 1990 Acura Integra
The fuel pump on the 1990-1993 Acura Integra is located inside the fuel tank. To access it, you must remove the rear seat. On the 2-door model, the pump is under the rear seat bottom. On the 4-door model, the pump is under a panel in the trunk.
You do not need to drop the fuel tank to replace the pump on this generation of Integra. The pump assembly is accessible through a round access panel under the rear seat. This makes the job much easier than on many other vehicles.
Step-by-Step Fuel Pump Replacement Procedure
Replacing the fuel pump on a 1990 Acura Integra is a medium-difficulty job that most DIYers can handle in a weekend. Here is the step-by-step process.
Step 1: Relieve Fuel System Pressure. Start the car, then pull the fuel pump fuse or the fuel pump relay. The engine will stall after a few seconds. Turn the ignition off. This releases the pressure in the fuel lines.
Step 2: Disconnect the Battery. Disconnect the negative battery terminal. This is a safety precaution to prevent sparks.
Step 3: Remove the Rear Seat. On a 2-door Integra, lift the rear seat cushion up and pull it forward to remove it. On a 4-door, open the trunk and remove the carpeted access panel.
Step 4: Remove the Access Cover. You will see a round metal or plastic cover plate held in place by three screws. Remove these screws and lift the cover off.
Step 5: Disconnect the Electrical Connector and Fuel Lines. You will see a 2-pin electrical connector for the pump. Unplug it. There are two fuel lines connected to the top of the pump assembly. The left line has a clip that must be moved out of the way before the line will pull off. The right line has a plastic retainer clip. Place a rag underneath to catch any fuel that drips out.
Step 6: Remove the Pump Assembly. The pump assembly is held to the tank by six 10mm nuts. Remove these nuts. Carefully lift the assembly up and out of the tank. It will need to be tilted at about a 45-degree angle to clear the opening. Cover the hole in the tank with a rag to keep fumes down.
Step 7: Disassemble the Old Pump. On your workbench, unplug the power plug from the pump. Slide the wire clip up and off the pump. There is a hose connecting the pump to the bracket. You can cut the old hose off with a knife by slicing it lengthwise. Then twist the old pump off the bracket.
Step 8: Transfer the Filter and Retaining Clip. The filter at the bottom of the pump is held on by a metal retaining clip. Carefully bend the three tabs up using a small flathead screwdriver to remove the filter. You will need to reuse this filter or the new one included with your kit. If the new filter has a different connection style, reuse the old filter.
Step 9: Install the New Pump. Install the new piece of hose onto the new pump. Match the overall length of the old pump from the bottom of the pump to the end of the hose. Install the filter and secure it with the retaining clip. Use a stainless steel zip tie for extra security.
Step 10: Reinstall the Assembly. Slide the new pump assembly back into the fuel tank. Secure the six nuts to the tank. The specified torque is 53 foot-pounds. Reattach the two fuel lines and plug in the electrical connector.
Step 11: Reinstall the Cover Plate. The three-screw cover plate goes on a specific way. There are small nipple-like guides to help you align it correctly.
Step 12: Reconnect the Battery and Test. Reconnect the negative battery terminal. Turn the ignition to the ON position and listen for the pump to prime. It should run for 2 seconds. Start the engine and check for leaks.
OEM vs. Aftermarket Fuel Pump Options for the 1990 Acura Integra
You have several options when choosing a replacement fuel pump for your 1990 Acura Integra. Each has its own advantages.
OEM Acura Fuel Pump (Part Number 17708-SK7-A36). The genuine Acura part is the most reliable choice. It is a direct replacement that fits perfectly. The OEM part number is 17708-SK7-A36, and it replaces several older part numbers including 17708sk7a30, 17708sk7a31, and 17708sk7a32. However, this part has been discontinued and is no longer available for purchase from many dealers.
Walbro Fuel Pump. Walbro is a popular aftermarket brand. For the 1990 Integra, the Walbro GSS341 (255 LPH) is a common upgrade. It flows significantly more fuel than the stock pump, making it a good choice if you have performance modifications. The 255 LPH pump flows about 132 liters per hour at 80 PSI. The high-pressure version (255 LPH-HP) flows over 210 liters per hour at the same pressure.
DENSO Fuel Pump (Part Number 951-0010). DENSO is a well-known OEM supplier. Their electric fuel pump 951-0010 is a direct replacement for the 1990-1993 Acura Integra with the 1.8L B18A1 engine. It uses turbine technology for quiet operation.
HFP Direct Replacement Fuel Pump. HFP offers a direct replacement pump that meets or exceeds OEM specifications. It features upgraded polymers and brushes for long life and is designed to be quiet. HFP pumps come with a lifetime free replacement warranty.
KEMSO Fuel Pump. KEMSO offers a high-performance 340 LPH fuel pump that is E85 compatible and designed for the 1990-1993 Acura Integra. It flows 340 liters per hour at 43 PSI and is designed to work in daily drivers, fast road cars, or performance builds. The kit includes two gradient density fuel strainers, a flex hose, rubber hose, wiring connector, and all necessary hardware. Each pump is individually tested for quality.
Why You Should Choose KEMSO for Your Fuel Pump Replacement
For the best balance of performance, reliability, and value, we strongly recommend the KEMSO Fuel Pump for your 1990 Acura Integra. KEMSO fuel pumps are high-performance units that deliver 340 LPH of flow, which is significantly more than the stock pump. This ensures your engine gets all the fuel it needs, even under heavy acceleration or with aftermarket modifications.
KEMSO pumps are designed as an OEM Replacement, meaning they fit directly into your Integra's fuel tank without any modifications. The kit includes everything you need: the pump, two fuel strainers, a flex hose, rubber hose, wiring connector, and hose clamps. This makes installation straightforward even for a DIY mechanic.
The best part? KEMSO backs every pump with a lifetime free replacement warranty. If you have any issue at any time, KEMSO will replace the pump free of charge. This gives you complete peace of mind that your investment is protected.
KEMSO pumps are also E85 compatible, so you can use ethanol-blended fuels without worrying about damage to the pump internals. The pump body diameter is only 3.8 cm, and the overall length is 12 cm, making it a perfect fit for the Integra's fuel tank.
Visit KEMSO Racing today to order your fuel pump: https://www.kemsoracing.com/
Tips for a Successful Fuel Pump Replacement
1. Replace the Fuel Filter. When you replace the fuel pump, it is a good idea to also replace the fuel filter. A clogged filter can put extra strain on the new pump and cause it to fail prematurely.
2. Use a Fuel Cutoff Switch. If your car does not already have a fuel cutoff switch, consider installing one while you have the fuel pump access panel open. This makes future work on the fuel system much safer and easier.
3. Clean the Tank. While the pump is out, take the opportunity to inspect the inside of the fuel tank. If there is any rust, debris, or sediment, clean it out. A dirty tank can clog the new pump's strainer.
4. Check the Wiring. Inspect the electrical connector and wiring for any signs of corrosion or damage. Clean the terminals and apply dielectric grease to prevent future issues.
5. Keep the Tank Full. Running your Integra on a low fuel tank can cause the fuel pump to overheat and wear out faster. The fuel in the tank helps cool the pump. Try to keep the tank at least a quarter full.
Common Questions About the 1990 Acura Integra Fuel Pump
Q: Can I drive with a bad fuel pump?
A: It is not safe. A failing fuel pump can cause the engine to stall suddenly, which can be dangerous in traffic. Replace it as soon as you notice symptoms.
Q: How long do fuel pumps last on the 1990 Integra?
A: A well-maintained fuel pump can last 100,000 to 150,000 miles. However, age and exposure to ethanol-blended fuels can shorten this lifespan.
Q: How much does a fuel pump replacement cost?
A: The cost varies widely. A DIY replacement using an aftermarket pump like KEMSO can cost under $100. If you hire a shop, expect to pay $200 to $500 or more, depending on labor rates.
Q: Do I need to drop the fuel tank to replace the pump?
A: No. On the 1990-1993 Integra, the pump is accessible through an access panel under the rear seat. You do not need to drop the tank.
Q: Will a higher-flow pump damage my engine?
A: No. A higher-flow pump like the KEMSO 340 LPH will not damage your engine. The fuel pressure regulator controls the pressure, and the pump simply provides enough flow. The engine will only use the fuel it needs.
Final Thoughts
The 1990 Acura Integra is a reliable and fun car, but like any vehicle, it needs regular maintenance. The fuel pump is a critical component that can fail without warning. By knowing the symptoms and how to replace it, you can keep your Integra running smoothly for many more miles.
If you need a replacement fuel pump, choose a quality brand that offers a lifetime warranty. KEMSO Racing provides high-performance, OEM replacement fuel pumps that are backed by a lifetime free replacement warranty. Their 340 LPH pump is a direct fit for the 1990-1993 Acura Integra and includes everything you need for installation.
Order your KEMSO Fuel Pump today at: https://www.kemsoracing.com/
Disclaimer: This guide is for informational purposes only. Always follow proper safety procedures when working with fuel systems. If you are not comfortable performing this repair, consult a professional mechanic.