Fuel Pump Pressure: 67 Mustang Maintenance Guide

The 1967 Mustang is a vintage car and a popular model among car enthusiasts for restoration projects. One common issue that owners face is finding the right fuel pump for their Mustang. There are various factors to consider when choosing a fuel pump, such as engine size, the use of a carburetor or fuel injection, and the desired level of noise during operation.

Some owners opt for mechanical fuel pumps, which are known for their durability and ability to deliver sufficient fuel flow for most applications. However, there have been challenges reported with fitting the fuel pump in the engine bay due to space constraints, especially when using a serpentine belt. Others have suggested using an electric fuel pump, which can be more convenient to mount near the fuel tank.

When it comes to specific fuel pump models, the Carter M4009 has been recommended by several Mustang enthusiasts for its integrated canister filter and ability to work with a carbureted engine. This pump is also available at a relatively affordable price. Another option mentioned is the Holley Red electric fuel pump, although it is noted for being louder than other options.

For those with fuel-injected engines, the choice of fuel pump becomes more critical. A high-pressure fuel pump is typically recommended for forced induction applications, as it can maintain the required fuel pressure differential across the fuel injectors. However, a high-volume fuel pump may also work, depending on the specific setup and horsepower goals.

Overall, selecting the right fuel pump for a 1967 Mustang involves considering the engine configuration, desired fuel delivery method, and personal preferences for noise and convenience.

Fuel pump location and mounting

The fuel pump on a 67 Mustang is located on the engine. The stock mechanical pump is located on the timing cover, but some owners choose to replace this with an electric fuel pump.

If you are installing an electric fuel pump, it should be mounted as close to the gas tank as possible, and below the tank if possible. This is because electric fuel pumps are designed to push fuel, not pull it.

There are several aftermarket mounting kits available for electric fuel pumps, which include rubber-coated brackets and foam rubber sleeves to reduce noise. It is also possible to fabricate your own bracket to mount the pump.

Some owners choose to mount the electric fuel pump in the engine compartment, or even in the trunk. While this is possible, it is not recommended for safety reasons. If you do choose to mount the pump inside the vehicle, it is important to include an inertia shut-off switch, which will shut off the fuel pump in the event of a collision.

Fuel pump compatibility with engine

Fuel pump compatibility with the engine is a critical aspect of maintaining the performance and efficiency of your Mustang. A faulty fuel pump can lead to issues such as shuddering and jolting when you step on the gas, and a malfunctioning relief valve can cause further problems.

When considering fuel pump compatibility, it is essential to match the pump to your Mustang's specific engine configuration. For a 1965 Mustang with a 6-cylinder 200ci engine, a fuel pump that delivers 4 to 6 psi is recommended. However, if your fuel pump is putting out higher pressure, such as 7 psi, you may need to install a regulator to control the fuel flow and prevent carburetor issues.

For a 1967 Mustang with a 289 engine and Trick Flow package, a compatible fuel pump option is the Carter M-4009, which has a built-in canister filter. This pump is designed to push fuel rather than pull it, so it should be mounted close to the tank and below the outlet if possible. It is also recommended to have a pre-pump filter and a regulator in the fuel system.

Another factor to consider is the fuel line configuration. Some Mustang owners prefer to use the original metal fuel line from the 1965 model, which eliminates the need for rubber hoses that can degrade over time and cause leaks. Additionally, ensuring that all fuel lines and hoses are compatible with modern ethanol-blended gas is crucial to prevent deterioration and potential fire hazards.

When replacing the fuel pump, it is also essential to consider the compatibility of other engine components. For example, the fuel filter should be placed after the pump, as fuel pumps are designed to push fuel rather than pull it against the resistance of a filter. Some Mustang owners have also recommended adding an oil pressure switch into the fuel pump circuit as cheap insurance for added peace of mind.

Fuel pump maintenance and replacement

Firstly, it is important to choose a suitable fuel pump for your Mustang. Some owners recommend the Carter M4009 fuel pump, which is available for around $35 on Amazon and features a canister filter. This pump is adequate for most applications, even dual and triple carburettor setups. It is also important to ensure that any fuel filters are properly configured. One filter should be located after the pump, but never before it, as this can damage the pump. Modern EFI high-pressure hoses are also recommended for any rubber hose sections in the fuel line to prevent deterioration due to ethanol in modern fuel.

When it comes to the replacement process, the fuel pump on a 1967 Mustang is typically accessed from the top of the engine bay. The power steering pump and AC brackets may need to be removed or loosened to gain access to the fuel pump mounting bolts. A long extension and shallow socket can be used to reach the bolts, which are visible from the front of the car by bending over the radiator. The rubber supply line should be disconnected before removing the pump, and a slight nudge may be required to release it.

When installing the new fuel pump, it is important to first align the bolts with the holes, which is easier to do from the top. A longer bolt or a rod can be used to start the installation and ensure proper alignment. It is also recommended to attach the new rubber supply line to the pump before installation, as the hard line on the apron is easier to access.

In addition to the standard fuel pump, some owners have opted for an electric fuel pump, especially when relocating the battery to the trunk. It is recommended to mount electric pumps near the fuel tank and below the outlet if possible, as they are designed to push fuel rather than pull it. Electric pumps should also be wired to a relay with power coming from the ignition and should include a fuse for safety.

Overall, fuel pump maintenance and replacement on a 1967 Mustang is a task that can be undertaken by the car owner with careful planning and attention to detail. By choosing suitable parts and following the recommended installation procedures, owners can ensure their Mustang's fuel system is reliable and safe.

Fuel pump pressure and volume

The Carter M4009 fuel pump is a popular choice for 1967 Mustangs with a 289 engine. It features a canister filter that effectively filters down to 10 microns, ensuring clean fuel delivery to the engine. This fuel pump offers a good balance of pressure and volume, providing adequate fuel flow rates for stock and mildly modified engines.

When considering fuel pump pressure and volume, it's important to match the pump's capabilities to your engine's requirements. A fuel pump that provides insufficient pressure or volume may lead to poor engine performance, including issues such as rough idling, hesitation, and a lack of power. On the other hand, a fuel pump with excessive pressure or volume can also cause problems, such as flooding the engine with fuel, leading to rich fuel mixtures and decreased performance.

It's worth noting that fuel pump pressure and volume are not the only factors affecting fuel delivery. The condition of the fuel filter, the diameter and length of the fuel lines, and the efficiency of the carburettor or fuel injectors all play a role in ensuring the engine receives the correct amount of fuel. Therefore, it's essential to consider the fuel delivery system as a whole when making modifications or troubleshooting fuel-related issues.

Additionally, when choosing a fuel pump, it's crucial to consider the type of fuel being used. Modern fuels with ethanol can degrade certain materials, so it's important to use compatible hoses and gaskets to prevent leaks and other issues.

Fuel pump electrical wiring

The electrical wiring of a fuel pump for a 67 Mustang can be a complex task, and it is important to ensure it is done correctly for safety and performance. Here is a guide on how to approach the wiring:

Firstly, it is recommended to mount the fuel pump near the gas tank, preferably below it, as electric fuel pumps are designed to push fuel, not pull it. It is also advised to keep the pump away from the exhaust and the rear end to avoid excessive heat. Make sure you have a regulator and an emergency impact switch, and consider mounting the pump on rubber to reduce noise.

When it comes to the wiring, it is important to fuse and relay the pump. You can tap into 12V from the ignition switch, but be mindful of the current flowing through the ignition wire to prevent an electrical fire. An inline fuse is recommended for safety, and you can also add a manual shut-off switch, which can double as an anti-theft device.

For further safety, consider installing an oil pressure switch or a pressure switch. The oil pressure switch is cheap insurance and easy to install, while the pressure switch will shut off the fuel pump if there is no tach signal from the ignition, which can be useful in the event of an accident.

Finally, ensure you have the correct gauge of wiring. A 10 GA wire is recommended for running from the ignition to the pump, and you may also need a 15-foot, 16-gauge wire loop for fuel pump control.

Frequently asked questions