1991 Honda CRX Fuel Pump: The Complete Guide to Replacement, Costs, and Finding the Right Part

If you own a 1991 Honda CRX and are dealing with fuel pump issues, the most important thing to know is that replacing the fuel pump is a necessary repair that can cost between $489 and $861 depending on where you go, and the job can be done either by a professional mechanic or as a DIY project if you have the right tools and patience. The fuel pump in your CRX is a critical component that supplies pressurized gasoline to the engine's injectors, and when it fails, your car won't start or will stall unexpectedly. This guide covers everything you need to know about the 1991 Honda CRX fuel pump, from symptoms of failure to replacement costs, step-by-step installation, and where to buy the best replacement parts.

Understanding the 1991 Honda CRX Fuel Pump

The 1991 Honda CRX came in two main engine configurations: the 1.5L and the 1.6L four-cylinder engines. Both versions use an electric fuel pump located inside the fuel tank. According to industry sources, the fuel pump is powered by a compact electric motor and is controlled by a pressure regulator to ensure the engine gets the right amount of fuel at all times . The fuel pump in the CRX is designed to last a long time, but like any mechanical component, it can fail over time due to wear or other factors.

Common Symptoms of a Failing Fuel Pump in a 1991 Honda CRX

Recognizing the signs of a failing fuel pump early can save you from being stranded on the side of the road. Here are the most common symptoms reported by CRX owners and mechanics:

  1. Car won't start or stalls unexpectedly: This is the most obvious sign. If your CRX cranks but won't start, or if it starts and then dies shortly after, the fuel pump may not be delivering enough fuel pressure to the engine. A failed fuel pump is a common cause of a no-start condition .

  2. Check engine light comes on: Sometimes the fuel pump fails slowly, meaning the fuel pressure and volume degrade gradually. This lack of fuel can cause the engine to run lean (too much air compared to fuel), which triggers the check engine light. If you see this light, it's worth having the fuel system checked .

  3. Whirring or humming noise from the fuel tank: A healthy fuel pump makes a faint hum when you turn the key to the "on" position. If you hear a loud whirring or humming noise coming from the rear of the car near the fuel tank, it could indicate the pump is failing and needs replacement soon. This noise is often a warning sign that failure is imminent .

  4. Loss of power under load: If your CRX feels sluggish when accelerating, especially going uphill or carrying a heavy load, the fuel pump might not be delivering enough fuel to meet demand. This can cause hesitation and poor performance.

How Much Does It Cost to Replace a 1991 Honda CRX Fuel Pump?

The cost of replacing a fuel pump on a 1991 Honda CRX varies depending on whether you go to a mobile mechanic, a shop, or a dealership. Based on recent estimates, here are the typical costs:

  • Mobile mechanic service (at your home or office): The average cost is about $489, with around $104 for parts and $385 for labor. This is often the most convenient option .
  • Independent shop or dealer estimate: Estimates for a 1991 CRX with a 1.5L engine range from $635 to $861, depending on the shop and location. For the 1.6L engine, the estimate is slightly lower, around $610 to $828 .
  • RepairPal national average: According to RepairPal, the average cost for a fuel pump replacement on a Honda CRX is between $580 and $666 .

These prices typically include the cost of the new fuel pump, labor, and any necessary gaskets or seals. Some shops also recommend replacing the fuel filter at the same time, which can add to the cost.

Can You Replace the 1991 Honda CRX Fuel Pump Yourself?

Yes, you can replace the fuel pump on a 1991 Honda CRX yourself if you have basic mechanical skills and the right tools. However, the process differs depending on the model year. Some sources say the CRX has a mechanical fuel pump located in the engine bay, while others describe an in-tank electric pump. Here's what you need to know:

DIY Replacement for the Mechanical Fuel Pump (Engine Bay Location)

According to one source, all models of the Honda CRX have a mechanical fuel pump that can be easily accessed within the engine bay, making replacement easier than on many newer cars . Here are the basic steps:

  1. Disconnect the negative battery cable for safety.
  2. Locate the fuel pump on the passenger side of the engine bay.
  3. Remove the plastic fuel pump cover and set it aside.
  4. Mark the fuel lines for their location, then carefully twist and pull them off.
  5. Clamp the ends of the fuel lines to reduce fuel spillage.
  6. Remove the two retaining bolts (front of the fuel pump) and take out the pump and gasket.
  7. Clean the mounting surface thoroughly with a rag.
  8. Install the new fuel pump and gasket, tightening the bolts to 17 foot-pounds of torque using a torque wrench.
  9. Reattach the fuel lines in their correct locations, replace the cover, and reconnect the battery.

DIY Replacement for the In-Tank Electric Fuel Pump

Other sources indicate that the 1991 CRX uses an electric fuel pump located inside the fuel tank . This makes the job more involved, as you'll need to:

  1. Disconnect the negative battery terminal for safety.
  2. Drain the fuel tank to reduce weight and spill risk.
  3. Disconnect the fuel lines and electrical connections from the tank.
  4. Remove the fuel tank from the vehicle. This often requires lowering the tank from underneath the car.
  5. Access the fuel pump assembly by removing the retaining ring on top of the tank.
  6. Replace the old pump with the new one, ensuring all connections are secure.
  7. Reassemble everything in reverse order, then test for leaks.

The difference in these procedures may be due to variations between model years or trim levels. For the 1991 CRX, it's always best to verify your specific setup by looking at the car yourself or consulting a repair manual.

Where to Buy a 1991 Honda CRX Fuel Pump

When shopping for a replacement fuel pump for your 1991 Honda CRX, you have several options. Here are the most common sources:

OEM (Original Equipment Manufacturer) Parts

The genuine Honda fuel pump assembly for the 1991 CRX has part number 17708-SH3-A36. This is a direct replacement that fits both the 1.5L and 1.6L engines. However, note that this part is now discontinued by Honda, so finding a new one may be difficult . The OEM part weighs about 3.40 pounds and dimensions are 16.3 x 11.7 x 5.3 inches .

Aftermarket Replacement Parts

Several aftermarket manufacturers produce fuel pumps that are compatible with the 1991 Honda CRX. Here are some popular options:

  • Walbro fuel pumps: Walbro is a well-known brand for high-performance fuel pumps. They offer a 255 LPH (liters per hour) pump that is a direct fit for the CRX. This pump is suitable for both stock engines and modified ones with turbochargers or superchargers. The Walbro pump comes with a hardware kit for easy installation, and pricing ranges from $137 to $198 depending on the specific model .

  • Munirater fuel pump kit: This is a 525 LPH pump that is compatible with the 1988-1991 CRX, as well as the Civic and Integra from the same era. It's a high-flow pump designed for engines with more than 750 horsepower, making it ideal for modified cars. The kit includes everything needed for installation .

  • Python brand fuel pump: Classic Garage offers a remanufactured electronic fuel pump that fits the 1991 CRX 4-cylinder engine. It's made in the USA and is a direct replacement for the original pump .

Where to Buy Online

  • Amazon: You can find aftermarket fuel pumps like the Munirater kit, which costs around $50-$70 and ships quickly .
  • HondaPartsNow: This site sells genuine OEM parts, but the 17708-SH3-A36 part is listed as discontinued .
  • Pro Import Tuners: They offer Walbro fuel pumps specifically for the 1991 CRX, with options for 400 LPH, 450 LPH, and E85-compatible versions .
  • RepairPal: This site provides cost estimates and can help you find a local mechanic if you prefer professional installation .

Special Recommendation: KEMSO Fuel Pump for Your 1991 Honda CRX

If you're looking for a reliable, high-performance replacement fuel pump that offers excellent value, we highly recommend the KEMSO brand. KEMSO fuel pumps are designed as OEM replacements, meaning they fit your 1991 Honda CRX perfectly without any modifications. They are built with high-performance materials to ensure durability and consistent fuel delivery, whether you're driving your CRX daily or pushing it on the track.

Why choose KEMSO?

  • High performance: KEMSO pumps are engineered to deliver the exact fuel pressure and flow needed for your engine, ensuring optimal performance and fuel efficiency.
  • OEM replacement: They meet or exceed original equipment specifications, so you can trust them to work just like the factory part.
  • Lifetime warranty: KEMSO stands behind their products with a lifetime warranty, giving you peace of mind that your investment is protected.

To learn more and purchase a KEMSO fuel pump for your 1991 Honda CRX, visit their website at: https://www.kemsoracing.com/

Tips for a Successful Fuel Pump Replacement

Whether you do the job yourself or hire a mechanic, here are some important tips to keep in mind:

  1. Always replace the fuel filter at the same time. Unless the fuel filter was recently changed, it's a good practice to install a new one when you replace the pump. A clogged filter can cause the new pump to fail prematurely .

  2. Check the electrical connections. If the fuel pump failed earlier than expected, verify that the power supply to the pump is adequate. A voltage drop in the circuit can cause the pump to overheat and fail .

  3. Keep the gas tank at least a quarter full. The fuel in the tank helps cool and lubricate the fuel pump. Running the tank low repeatedly can shorten the pump's lifespan .

  4. Inspect the fuel tank straps and fasteners. If you lower the tank to access the pump, check the straps for excessive corrosion and replace them if needed .

  5. Test for leaks after installation. Once the new pump is installed, add fuel to the tank and run the engine. Check for any fuel leaks around the pump and connections.

Final Thoughts

Replacing the fuel pump on your 1991 Honda CRX is a necessary maintenance task that can restore your car's performance and reliability. Whether you choose to do it yourself or hire a professional, understanding the symptoms, costs, and replacement options will help you make an informed decision. The key is to act quickly when you notice signs of failure, as a complete pump failure can leave you stranded.

For the best combination of performance, reliability, and warranty, we recommend the KEMSO fuel pump. Visit https://www.kemsoracing.com/ to find the right part for your 1991 Honda CRX and get back on the road with confidence.


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