STANDARD PR391 Intermotor Fuel Injection Pressure Regulator 707390477725

( Brand: Standard ), ( Part Type: Fuel Pressure Regulator ), ( Manufacturer Part Number: PR391 ), ( Product Type: Fuel Delivery ), ( UPC: 707390477725 ), ( California Prop 65 Warning: Cancer And Reproductive Harm. ), ( Fitment Type: Direct Replacement ), ( Compatible Make S : Hyundai, Kia ), ( Compatible Model S : Sonata, Santa Fe, Optima, Magentis ), ( Fitnote: Manufactured Before June ), ( Product Subtype: Fuel Pressure Regulators ), ( Series: Intermotor ), ( Product Details: Fuel Injection Pressure Regulator ), ( Department: Replacement )

Review STANDARD Intermotor Fuel Injection Pressure Regulator

The PR391 Intermotor Fuel Injection Pressure Regulator is a crucial component in the fuel delivery system of various engines, ensuring optimal fuel pressure for efficient combustion. This regulator is designed to maintain a stable fuel pressure, compensating for changes in engine load and temperature.

The PR391 is a diaphragm-type regulator, which means it utilizes a flexible diaphragm to separate the fuel pressure chamber from the atmosphere. The regulator housing is made of durable cast aluminum, providing excellent heat dissipation and resistance to corrosion. The diaphragm is made of a high-strength elastomer material, capable of withstanding the rigors of continuous fuel pressure regulation.

The PR391 is designed to fit a wide range of applications, making it a versatile choice for various engines. It features an adjustable spring preload, allowing you to fine-tune the fuel pressure to your specific engine requirements. The adjustment is made through a convenient external adjustment nut, which can be accessed without removing the regulator from the engine.

The PR391 Intermotor Fuel Injection Pressure Regulator comes with a built-in pressure relief valve, which helps protect the engine from overpressure situations. This valve ensures that the fuel pressure remains within safe limits, preventing potential engine damage.

The fuel inlet and outlet connections on the PR391 are designed with a standard 3/8" NPT thread, ensuring easy integration with most fuel delivery systems. The regulator also comes with a mounting bracket, allowing for secure installation on the engine or fuel tank.

The PR391 Intermotor Fuel Injection Pressure Regulator is a high-quality, reliable solution for maintaining the correct fuel pressure in your engine. Its robust design, easy adjustability, and integrated pressure relief valve make it an essential component for any fuel delivery system.

Buying a standard PR391 Intermotor fuel injection pressure regulator involves weighing its potential benefits against the possible drawbacks. Here are some pros and cons to consider:

1. Improved Fuel Efficiency: A faulty or worn-out fuel injection pressure regulator can lead to poor fuel economy. Replacing it with a new one can help restore optimal fuel pressure and improve your vehicle's fuel efficiency.

2. Better Engine Performance: Proper fuel pressure is essential for efficient combustion. By maintaining the correct fuel pressure, you can help your engine perform at its best, which can result in smoother idling, increased power, and better acceleration.

3. Longer Engine Life: A faulty fuel pressure regulator can lead to various engine issues, such as misfiring, rough idling, and stalling. Addressing this problem with a new PR391 Intermotor fuel injection pressure regulator can help prevent these issues and extend the life of your engine.

4. Cost-Effective: Replacing a faulty fuel pressure regulator is generally more cost-effective than dealing with the potential engine damage that can result from ignoring the problem.

1. Installation Complexity: Installing a new fuel injection pressure regulator can be a complex process, especially if you're not mechanically inclined. It may require specialized tools and knowledge, which could result in additional costs if you choose to have it installed by a professional.

2. Potential for Incorrect Installation: Improper installation of the new fuel injection pressure regulator can lead to various engine issues, such as poor fuel economy, rough idling, and engine damage. Ensuring that the installation is done correctly is crucial to avoid these potential issues.

3. Cost: The cost of a new PR391 Intermotor fuel injection pressure regulator can vary depending on the make and model of your vehicle. While it's generally a cost-effective solution compared to engine repairs, it can still be a significant expense for some vehicle owners.

4. Availability: In some cases, it may be challenging to find a new PR391 Intermotor fuel injection pressure regulator, especially for older or less common vehicle makes and models. This could result in additional time and costs spent searching for a replacement part.

The decision to buy a standard PR391 Intermotor fuel injection pressure regulator depends on the specific needs and circumstances of your vehicle. Weighing the potential benefits, such as improved fuel efficiency, better engine performance, and longer engine life, against the potential drawbacks, such as installation complexity, cost, and availability, can help you make an informed decision.

If you're experiencing issues with your vehicle's fuel injection system, it's recommended to have a qualified mechanic diagnose the problem and determine if a new PR391 Intermotor fuel injection pressure regulator is the best solution. While the installation process can be complex, having a professional handle it can help ensure that the problem is properly addressed and that your vehicle is restored to optimal performance. Additionally, consider purchasing a new fuel injection pressure regulator from a reputable supplier to ensure that you're getting a high-quality part.

part # pr391 prices

• $63.50-$112.99

specifications fuelperforma:

• brand: Standard
• part type: Fuel Pressure Regulator
• manufacturer part number: PR391
• product type: Fuel Delivery
• upc: 707390477725
• california prop 65 warning: Cancer And Reproductive Harm.
• fitment type: Direct Replacement
• compatible make s : Hyundai, Kia
• compatible model s : Sonata, Santa Fe, Optima, Magentis
• fitnote: Manufactured Before June
• product subtype: Fuel Pressure Regulators
• series: Intermotor
• product details: Fuel Injection Pressure Regulator
• department: Replacement

general fuelperforma:

• Auto Permance Parts > Fuel Systems > Fuel Pressure Regulators
• condition: New

returns fuelperforma:

• time: 30 Days
• paid by: Seller
• policy: Returns Accepted

shipping fuelperforma:

• transit: 3-6 Days
• type: Calculated
• cost: $18.50
• class: Standard
• service: FedEx Ground / FedEx Home Delivery
• carrier: FedEx

offer fuelperforma:

• sold: 0
• options: Ship-to-home
• quantity: 4
• started: October 19, 2025
• availability: In Stock

seller fuelperforma:

• rating: 97.6%
• # reviews: 349103

payments fuelperforma:

• wallet: Apple-pay
• other
• credit card: Mastercard

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