Electric Fuel Pump Upgrade Guide for 1955-1959 Buick Roadmaster
Considering a move from your Roadmaster's original mechanical fuel pump to a modern electric one? Here's what you need to know.
- An electric fuel pump is an aftermarket upgrade for the 1955-1959 Roadmaster, not an original part.
- This conversion helps prevent common classic car issues like vapor lock and hard starting after storage.
- You must use a low-pressure pump (4-7 PSI) to avoid flooding the carburetor.
- For safety, wire the pump through an oil pressure switch or inertia switch to shut it off if the engine stops.
Upgrading Your Roadmaster to an Electric Fuel Pump
The original mechanical fuel pump on your 1955-1959 Buick Roadmaster was a simple, effective design for its time. However, with modern ethanol-blended fuels and the heat generated by the large Nailhead V8 engine, these pumps can be prone to issues like vapor lock, which causes stalling when hot. Many owners choose to convert to an aftermarket electric fuel pump for improved reliability and easier starting. 🎬 Watch this guide on converting from mechanical to electric fuel pumps. An electric pump provides a steady supply of fuel at a consistent pressure, which is something a mechanical pump can struggle with.
Symptoms of a Failing Fuel Pump
Whether you have the original mechanical pump or an aftermarket electric one, the signs of failure are similar because they both lead to the engine not getting enough fuel. You might notice your engine sputtering, especially at higher speeds or when going up hills. Other common symptoms include the engine stalling unexpectedly, difficulty starting, or a noticeable loss of power during acceleration. In some cases, a failing electric pump may make a loud whining noise from the rear of the vehicle.
Choosing the Right Aftermarket Electric Pump
For a carbureted vehicle like the Buick Roadmaster, it is critical to choose a low-pressure electric fuel pump. The Mr. Gasket 12S is a universal pump designed for carbureted engines and is rated for 4-7 PSI, which is appropriate for the Roadmaster's V8. Using a high-pressure pump designed for fuel injection would overwhelm the carburetor and cause flooding. Mr. Gasket is a well-known brand in the classic car and hot rod community, offering a budget-friendly option for this type of conversion. While many users find them to be reliable, some have reported early failures, so quality can be inconsistent.
Pro Tip: Safety First
When installing an electric fuel pump, it's highly recommended to also install a safety shut-off switch. This can be an oil pressure switch or an inertia switch. It's designed to automatically turn off the fuel pump if the engine stalls or in the event of an accident, preventing fuel from being pumped continuously, which is a major fire hazard.
Cost of Replacing Your Fuel Pump
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket Electric Pump (Mr. Gasket) | $77.63 |
| New Aftermarket Mechanical Pump | $30 - $60 |
| Shop Labor for Electric Conversion | $250 - $500 |
Frequently Asked Questions (FAQ)
Why should I convert to an electric fuel pump?
Converting to an electric fuel pump can improve starting, especially after the car sits for a while, and can prevent vapor lock, which causes stalling in hot weather. It provides a more consistent and reliable fuel supply than the original mechanical pump.
Do I need a fuel pressure regulator?
If you choose a low-pressure pump designed for carburetors (like 4-7 PSI), you may not need a separate regulator. However, adding an adjustable regulator is always a good practice to ensure you can fine-tune the pressure perfectly for your carburetor and prevent any chance of flooding.
Where should the electric fuel pump be mounted?
Electric pumps are most effective when they push fuel, not pull it. For this reason, the best location is near the fuel tank and as low as possible. This helps ensure the pump is gravity-fed from the tank and reduces the risk of vapor lock.
Are there any recalls on the fuel system for my Roadmaster?
There are no recalls or technical service bulletins (TSBs) from NHTSA related to converting a 1955-1959 Buick Roadmaster to an electric fuel pump, as this is an aftermarket modification. Searches for official recalls for this vehicle year range yield no relevant results for the fuel system.
Helpful Videos
Technical Specifications
Requires a low-pressure pump (e.g., 4-7 PSI) compatible with a carbureted V8 engine. The original mechanical pump operated at approximately 4-5 PSI.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.