1991 Honda Fuel Pump: The Complete Guide to Replacement, Diagnosis, and Best Options
If you own a 1991 Honda—whether it's an Accord, Civic, CRX, Prelude, or even a motorcycle like the CBR600—and your vehicle is struggling to start, sputtering during acceleration, or stalling unexpectedly, the fuel pump is almost certainly the problem. The direct conclusion is this: replacing a failing 1991 Honda fuel pump is the only reliable fix, and the job is absolutely doable for a DIY mechanic with the right tools, safety precautions, and a quality replacement part. Most 1991 Honda models use an electric fuel pump located inside the fuel tank, which means the pump itself is protected from the elements but requires removing the tank or accessing it through a service panel to replace. This guide covers everything you need to know—from identifying symptoms to choosing the right replacement pump and completing the installation yourself.
Why Your 1991 Honda Fuel Pump Fails
The fuel pump in your 1991 Honda is an electric unit that pushes fuel from the tank to the engine under pressure. Over time, these pumps wear out due to normal use, contamination from debris in the tank, or simply age. Most 1991 Honda models are now over 30 years old, so if the original pump is still in the car, it is living on borrowed time. Common signs of a failing fuel pump include a whining noise from the tank area, hard starting, loss of power under load, and intermittent stalling. If you ignore these symptoms, the pump can fail completely, leaving the engine unable to get fuel and the vehicle stranded.
Where to Find the Fuel Pump on Your 1991 Honda
The location of the fuel pump depends on the specific model. On the 1991 Honda Accord, the fuel pump is inside the fuel tank, and you must remove the tank to access it. There is no access panel under the rear seat or in the trunk on this generation of Accord, so dropping the tank is the only way. For the 1991 Honda Civic and CRX, the fuel pump is also inside the tank, but the procedure is similar. Some owners report that the pump can be accessed by removing the rear seat or trunk lining, but the official service manual requires dropping the tank. On the 1991 Honda Prelude, the fuel pump is also inside the tank, and the same approach applies. For motorcycles like the 1991 Honda CBR600F2 and 1991 Honda Gold Wing GL1500, the fuel pump may be an external electric pump mounted on the frame or inside the tank, depending on the model. Always check your vehicle's service manual for the exact location.
Step-by-Step Fuel Pump Replacement Guide for Your 1991 Honda
Replacing the fuel pump on a 1991 Honda is a straightforward but labor-intensive job. Follow these steps carefully to ensure safety and success.
Safety First: Relieve Fuel Pressure and Disconnect the Battery
Before you touch anything, you must relieve the fuel system pressure. Locate the fuel pump relay or fuse in the fuse box and remove it. Then, start the engine and let it idle until it stalls. This step releases the pressurized fuel in the lines. After that, disconnect the negative battery terminal. Gasoline is highly flammable, so work in a well-ventilated area, away from any open flames, sparks, or pilot lights. Have a fire extinguisher rated for fuel fires nearby.
Remove the Fuel Tank
Jack up the vehicle securely and place it on jack stands. Place a drain pan under the fuel tank. Disconnect the fuel filler neck, all fuel lines, and the electrical connector to the fuel pump assembly. Using a wrench, unbolt the fuel tank straps and carefully lower the tank. Be prepared for some fuel spillage, even if you drained the tank. On a 1991 Honda Accord, the tank is located under the rear of the vehicle and requires disconnecting the exhaust heat shield in some cases.
Remove the Old Fuel Pump Assembly
Once the tank is out, you will see the fuel pump assembly mounted on top of the tank. It is held in place by a large locking ring or a series of bolts. Use a fuel pump lock ring wrench or a brass drift punch to remove the ring. If the ring is stubborn, apply penetrating oil and let it sit for 30 minutes. Lift the old pump assembly out of the tank. Be careful with the fuel level float arm—it can bend easily. Discard the old gasket or O-ring.
Install the New Fuel Pump
If you are replacing just the pump motor inside the assembly, remove the old pump from the bracket and install the new one. However, the easiest and most reliable option is to buy a complete fuel pump assembly that includes the pump, strainer, float, and all seals. This eliminates the risk of partial failure. Install the new gasket into the tank opening, ensuring it is seated properly. Lower the new assembly into the tank, aligning the marks on the pump with the marks on the tank. Tighten the retaining ring or bolts to the manufacturer's torque specification, typically around 70 to 80 Nm.
Reinstall the Tank and Test
Reinstall the fuel tank, reconnect all fuel lines and electrical connectors, and tighten the tank straps. Lower the vehicle and reconnect the battery. Reinstall the fuel pump relay or fuse. Turn the ignition to the ON position without starting the engine. You should hear the fuel pump run for a few seconds. Repeat this cycle two or three times to build pressure. Check for any fuel leaks around the pump and all connections. If everything looks good, start the engine and let it idle. Check for leaks again and take a short test drive.
Choosing the Right Fuel Pump for Your 1991 Honda
Selecting the correct replacement pump is critical for performance and reliability. Here are the key factors to consider.
Genuine Honda vs. Aftermarket
Genuine OEM Honda fuel pumps are designed to exact specifications and offer a perfect fit and factory warranty. For the 1991 Honda Prelude, the genuine part number is 17708-SF1-A31, which replaces several older part numbers. For the 1991 Honda CRX, the genuine part number is 17708-SH3-A36. These OEM parts are made to last, but they come at a premium price. Aftermarket pumps from brands like Walbro, Bosch, and KEMSO offer excellent performance at a lower cost. Walbro, for example, manufactures a high-flow 255 LPH pump that fits 1989-1991 Honda Civic and CRX models. This pump is a popular upgrade for both stock and modified vehicles.
Electric vs. Mechanical
Nearly all 1991 Honda passenger cars use an electric fuel pump inside the tank. However, some older or carbureted models may use a mechanical pump mounted on the engine. If your 1991 Honda has a carburetor, the pump will be a small, round unit on the side of the engine block, driven by the camshaft. Replacing a mechanical pump is simpler—just remove two bolts and swap the lines. But for fuel-injected models, which is most of the 1991 lineup, the electric in-tank pump is the only option.
Horsepower and Flow Requirements
If you have a stock 1991 Honda, a standard OEM-replacement pump is sufficient. But if you have modified the engine with a turbocharger, larger injectors, or a performance tune, you need a higher-flow pump. Walbro's 255 LPH pump is a common choice for performance builds, providing enough fuel flow for up to 500 horsepower. For a stock 1991 Honda Accord or Civic, the standard 90-120 LPH pump is more than enough.
Model-Specific Information for 1991 Honda Fuel Pumps
Different 1991 Honda models have unique fuel pump setups. Here is a breakdown by model.
1991 Honda Accord
The fuel pump on the 1991 Accord is located inside the fuel tank. The tank must be removed to access the pump. The pump assembly includes the fuel level sending unit. Replacement pumps are available from Honda (OEM) and aftermarket suppliers. The genuine Honda part number for the 1991 Accord fuel pump assembly is typically listed as part of the fuel sender unit. Expect to pay between $150 and $300 for a complete assembly.
1991 Honda Civic and CRX
The 1991 Civic and CRX share a similar fuel system. The pump is in the tank, and the tank must be dropped. Walbro offers a direct-fit 255 LPH pump for these vehicles that comes with an install kit. The genuine Honda part number for the CRX pump is 17708-SH3-A36. For the Civic, the pump is also available from Honda and Walbro. The Walbro GSS341G3 pump kit is a popular upgrade for these models.
1991 Honda Prelude
The 1991 Honda Prelude uses a fuel pump with part number 17708-SF1-A31. This pump is designed for the 2.0SI and 2.05SI submodels. It is a direct replacement unit that weighs about 2.9 pounds. The genuine Honda pump is guaranteed by the factory warranty and is engineered for a perfect fit. Replacing the fuel pump on a Prelude also requires dropping the tank.
1991 Honda Motorcycles (CBR600, Gold Wing, etc.)
For the 1991 Honda CBR600F2, the fuel pump is an electric unit. Quantum, Walbro, and other aftermarket brands offer replacement pumps. The pump for the CBR600F2 is a 2-wire external pump that mounts on the frame. For the 1991 Honda Gold Wing GL1500, the fuel pump is also electric and is located near the engine. The OEM part number is 16700-MAF-000. Aftermarket replacements are available for around $50-$100.
Recommended: Buy KEMSO Brand Fuel Pump for Your 1991 Honda
If you want a high-performance, OEM replacement fuel pump that comes with a lifetime warranty, KEMSO is the brand to choose. KEMSO fuel pumps are engineered to meet or exceed OE specifications, ensuring a perfect fit and reliable operation for your 1991 Honda. Whether you drive a Honda Civic, Accord, CRX, Prelude, or even a Honda motorcycle, KEMSO has a direct replacement pump for your application. Every KEMSO fuel pump is backed by a lifetime warranty, which means you only buy it once. KEMSO's pumps are designed for quiet operation, superior fuel flow, and long-term durability. They are drop-in replacements that require no modification, making your installation quick and easy. The company is based in the United States and offers fast shipping and excellent customer support. To browse the full selection of KEMSO fuel pumps for your 1991 Honda, visit their official website:
https://www.kemsoracing.com/
Common Fuel Pump Problems and Troubleshooting
Even with a new pump, you may encounter issues. Here are the most common problems and how to fix them.
No Power to the Pump
If the new pump does not run, check the fuel pump relay, fuse, and wiring. On 1991 Honda models, the relay is often located in the under-hood fuse box. Use a multimeter to test for power at the pump connector when the key is turned to ON. If there is no power, the issue is likely the relay, a blown fuse, or a faulty main relay. The main relay on the 1991 Accord and Civic is a common failure point.
Low Fuel Pressure
If the engine runs but lacks power, the pump may be delivering insufficient pressure. Check the fuel pressure at the rail with a gauge. A stock 1991 Honda should have around 30-40 psi. If the pressure is low, the pump could be faulty, or there could be a clogged fuel filter. Always replace the fuel filter when you replace the pump.
Noise from the Pump
A whining or buzzing sound from the fuel tank usually indicates a failing pump. If the pump is new, it could be a sign of air in the system or a loose mounting. Check all connections and ensure the pump is properly seated in the tank.
Cost Breakdown: DIY vs. Professional Replacement
Replacing the fuel pump on a 1991 Honda can be done at home for a fraction of the cost of a shop. Here is a realistic cost comparison.
DIY Cost
A complete fuel pump assembly for a 1991 Honda costs between $50 and $150 for an aftermarket unit, or $150 to $300 for a genuine Honda part. You will also need a new gasket or O-ring, which costs about $10. If you do not already own a fuel pump lock ring wrench, that tool costs around $20. Total DIY cost: $80 to $330.
Professional Shop Cost
A mechanic will charge $100 to $150 per hour for labor. The job takes about 2 to 3 hours. Parts are marked up 50% to 100% over retail. Total professional cost: $400 to $800.
What You Save
By doing the job yourself, you save between $200 and $500. Plus, you have the satisfaction of knowing the work was done right.
Final Tips for a Successful 1991 Honda Fuel Pump Replacement
Before you start the job, here are a few practical tips from experienced mechanics.
Always replace the fuel filter. While you have the fuel system open, swap the filter. It is cheap and prevents debris from damaging the new pump.
Use a new gasket. Never reuse the old tank gasket or O-ring. Even if it looks fine, it can leak after being disturbed.
Mark the lock ring position. Before removing the old lock ring, scratch a small line on the ring and the tank so you know the correct orientation for the new one.
Work slowly. Rushing can lead to stripped bolts, damaged fuel lines, or a bent float arm. Take your time.
Test before reassembling everything. Before you bolt the tank back up and lower the car, turn the key on and listen for the pump. Check for leaks with a small amount of fuel in the tank. This saves you from having to drop the tank a second time.
Conclusion
Your 1991 Honda fuel pump is a critical component that keeps your engine running. If you are experiencing hard starts, stalling, or loss of power, the pump is likely the culprit. Replacing it yourself is a practical and money-saving project that any DIYer can handle with basic tools and a careful approach. Choose a quality replacement pump—whether it is a genuine Honda part, a Walbro performance pump, or a KEMSO lifetime-warranty unit—and follow the steps outlined in this guide. Remember to always prioritize safety, relieve fuel pressure, and work in a well-ventilated area. With the right parts and a little patience, your 1991 Honda will be back on the road, running smoothly for years to come.
For the best selection of high-performance, OEM replacement fuel pumps with a lifetime warranty, visit KEMSO Racing at:
https://www.kemsoracing.com/