Adjusting Sard Fuel Pressure Regulator: A Step-By-Step Guide

The SARD fuel pressure regulator is an adjustable regulator that can be used on any vehicle. It is designed to provide the correct fuel pressure for any high-performance fuel-injected vehicle. The regulator can adjust the amount of fuel entering the engine by turning an adjustment part. The pressure adjustment is made by simply rotating the adjustment nut on the top of the regulator directly below the top (pressure source) port. The regulator has a 1/8 PT service hole to allow for the installation of a fuel pressure regulator or fuel line to additional fuel injectors. The regulator has two ports: a bottom port and a side port. The bottom port is the return to the tank, while the side port is the return from the rail and gauge or is plugged.

Installing a SARD fuel pressure regulator

Before starting, ensure you have chosen a suitable FPR for your vehicle. The SARD FPR is designed to provide steady fuel pressure for high-performance fuel-injected vehicles. It allows for adjustments to the amount of fuel entering the engine.

First, relieve the fuel pressure from your fuel lines. This can be done by unplugging the fuel cap, removing the fuel pump fuse, and cranking the car. It is important to work with fuel safely, so do not perform this installation immediately after driving.

Next, remove your old FPR. Typically, the FPR is held in place with screws, so use the appropriately-sized tools to carefully remove them. Once the screws are removed, carefully pull out the old FPR, being cautious of any fuel spillage. You may also need to remove the fuel hose or loosen the clamps.

Now, you can install the new SARD FPR. Refer to your vehicle's repair manual to identify the correct location and orientation for the new FPR. You may need to test fit the FPR and make adjustments to ensure a proper fit. The SARD FPR includes a mounting bracket to simplify the installation process.

After ensuring the FPR is securely mounted, finalize the fuel lines plumbing. Refer to the FPR manual to identify the fuel inlet and outlet ports. You may need to use fittings, such as 90-degree or straight fittings, to connect the FPR to the corresponding ports on the fuel rail and the factory fuel line.

Before starting the car, ensure all connections are secure and there are no leaks. Once you are satisfied with the installation, start the car and adjust the fuel pressure as needed. Consult your vehicle's repair manual or seek professional advice for specific instructions on adjusting the fuel pressure.

Finally, take your vehicle for a test drive to ensure the SARD FPR is functioning optimally.

Adjusting the regulator to control fuel pressure

It is important to note that the SARD fuel pressure regulator has specific ports for fuel inlet and outlet. The regulator is typically equipped with 8mm (5/16") barb fittings that screw into the 1/8" NPT ports. Ensure that you have identified the correct ports for fuel inlet and outlet to avoid any issues. Additionally, the regulator features a 1/8" BSP port on the side, which can be used for connecting a fuel pressure sensor or gauge. If you plan to use this port for a fuel pressure gauge, you may need an adapter, such as a 1/8" BSP to 1/8" NPT adapter.

When adjusting the fuel pressure, it is crucial to follow the manufacturer's instructions and take the necessary safety precautions. Ensure that you are working in a well-ventilated area and that there are no sources of ignition nearby. It is also recommended to relieve the fuel pressure from the lines before making any adjustments. This can be done by removing the fuel pump fuse and allowing the car to stall and turn off.

It is worth noting that the SARD fuel pressure regulator is designed for turbocharged and naturally aspirated petrol engines with a fuel system that supports up to around 500 horsepower. It is essential to ensure that your vehicle's fuel system specifications match the regulator's capabilities. Always refer to the manufacturer's guidelines and seek professional assistance if you are unsure about any aspect of the adjustment process.

By following these instructions and taking the necessary precautions, you can safely and effectively adjust the SARD fuel pressure regulator to control the fuel pressure in your vehicle.

The regulator's compatibility with your setup

The SARD fuel pressure regulator is compatible with most vehicles, but some modifications may be required for your specific setup. The regulator is designed to fit most vehicles, but it is always recommended to consult with a professional or refer to the manufacturer's instructions for your particular vehicle to ensure proper installation and compatibility.

The SARD regulator is suitable for both naturally aspirated and turbocharged vehicles, making it a versatile option for a range of setups. It is ideal for vehicles up to ~450whp, and it helps regulate fuel pressure to ensure stable fuel delivery under various loads.

One important consideration is the adapter required for installation. The SARD fuel regulator allows for the use of an 8mm hose nipple or an AN#6 adaptor bolt. Some vehicles may need adapters for proper installation, so it is essential to check the adapter section or consult a professional if you are unsure about the specific requirements for your vehicle.

Additionally, the Type-R model of the SARD regulator is specifically designed for high horsepower naturally aspirated fuel-injected and turbocharged engines. It features a larger-size diaphragm for hard-tuned turbo vehicles and can provide more fuel under high turbo boost conditions. If you have a high-performance vehicle, the Type-R model might be a better fit for your setup.

It is worth noting that there are fake knock-off regulators in the market, so be sure to purchase from a trusted source to avoid any potential damage to your engine.

The regulator's inlet and outlet ports

The SARD fuel pressure regulator comes with two 8mm (5/16") barb fittings that screw into the 1/8" NPT ports on the regulator for the fuel inlet and outlet ports. The regulator housing has a 1/8 PT service hole to allow for the installation of a fuel pressure regulator or fuel line to additional fuel injectors. The regulator allows the use of either 1/8 NPT 8mm hose nipples or an AN#6 adapter bolt.

The fuel inlet port is where the fuel enters the regulator from the fuel rail. The fuel outlet port is where the fuel exits the regulator and returns to the fuel tank. The side port on the regulator is for connecting a fuel pressure sensor or gauge. This port can also be used to plug in a vacuum hose from the manifold.

When installing the regulator, it is important to identify the correct ports for the fuel inlet and outlet. The location of these ports may vary depending on the vehicle, so it is recommended to consult the FPR manual. Once the regulator is installed, the fuel pressure can be adjusted by rotating the adjustment nut on the top of the regulator directly below the top (pressure source) port.

It is also important to ensure that the correct fittings and hoses are used when installing the regulator. The regulator should come with the necessary hose tails, but a fuel pressure gauge may need to be purchased separately.

Troubleshooting high fuel pressure

High fuel pressure can be caused by a few issues with your vehicle. Firstly, it's important to understand the function of a fuel pressure regulator. This component keeps a certain amount of fuel pressure in the rail and sends the rest back to the tank. The SARD adjustable fuel regulator can be adjusted by turning an adjustment part, allowing you to control the amount of fuel entering your engine.

Now, if you're experiencing high fuel pressure, there are a few things to check and some troubleshooting steps to take.

Common Symptoms of High Fuel Pressure:

• A gasoline smell coming from the exhaust pipe.
• Wet spark plugs due to engine flooding.
• Blackened spark plugs.
• Low fuel economy and constant refuelling.
• Poor engine performance.
• Black smoke from the exhaust.

Possible Causes of High Fuel Pressure:

Fuel Pressure Regulator:

A faulty or bad fuel pressure regulator is a common cause of high fuel pressure. If the regulator is stuck in the closed position, the flow of fuel to the combustion chamber is restricted, causing the fuel pump to work harder and increasing the fuel pressure.

Clogged Return Line:

Over time, the return line can become clogged with dirt or other debris. This restricts the movement of fuel back to the gas tank, causing the pressure inside the return line to rise and increasing the overall fuel pressure.

Troubleshooting Steps:

Checking the Fuel Pressure Regulator:

If you suspect the fuel pressure regulator is the culprit, locate it in your vehicle. For carburetor engines, it's usually in the fuel pump, while for fuel-injected engines, it's typically at the end of the fuel rail. Before making any adjustments or repairs, it's recommended to take pictures or videos and make notes on how the parts are assembled for easier reassembly.

If the regulator is stuck closed, you may need to replace it with a new one. Additionally, you might want to replace the filter in your fuel pump at the same time. When installing the new regulator, apply oil to its O-ring, and be sure to use a new rubber hose. You may need to heat both ends of the hose to fit it easily.

Checking the Return Line:

If the issue is a clogged return line, you'll need to detach it and clean it out. Put some penetrating oil into the line and blow compressed air from the tank end to force the clog out. If the problem persists or is with the fuel line couplings, you may need to replace them.

When to Seek Professional Help:

While adjusting the fuel pressure regulator or cleaning the return line are relatively straightforward tasks, fuel systems can be complex, and issues can arise. If you're uncomfortable with any of the troubleshooting steps or if the problem persists, it's best to consult a trusted mechanic or specialist. They will have the knowledge and tools to diagnose and resolve the issue, ensuring your vehicle runs smoothly and safely.

Frequently asked questions