/live/media/SI/SI_PR491_Fro.jpg)
Standard Ignition PR491 Fuel Injection Pressure Regulator
| Brand | Standard Ignition PR491 |
|---|---|
| Adjustable | Yes |
| Contents | Includes Caution Sheet |
| Fuel Type | Gas |
| Functions | Regulator |
| New or Reman | New |
| Number of outlets | 1 |
| Reference Port Included | No |
| Type | Returnless |
| Fits | Mazda · 2 vehicles |
Returnless design. Helps regulate fuel injection pressure in gas systems.
Adjustable setting. Lets you fine-tune pressure for the application.
New part. Fresh replacement from Standard Ignition.
Cross-references Dorman - OE Solutions 800-603, Gates 24199 and Standard Ignition PR491 for the same application. See all 5.
Fuel Pressure Control for Mazda 6
Standard Ignition PR491 is a new, adjustable fuel injection pressure regulator for gas returnless systems. It is built for 2009-2010 Mazda 6 applications and helps maintain consistent fuel delivery under changing engine demand.
Key Features
- Adjustable fuel injection pressure regulator for returnless gas systems
- Single inlet and single outlet layout for direct fuel system integration
- New replacement part from Standard Ignition
- Includes caution sheet for handling and service guidance
- No reference port included
Detailed Description
Standard Ignition PR491 is a fuel injection pressure regulator engineered for returnless gasoline fuel systems. It regulates fuel pressure within the injection system to support stable fuel delivery, which is important for drivability, throttle response, and consistent engine operation. This PR491 fuel injection pressure regulator is listed for 2009-2010 Mazda 6 models and is a direct-fit service part for those applications. This part cross-references Dorman OE Solutions 800-603 for the same application.
What It Helps Address
- Fuel pressure that is too high or too low
- Hard starting related to unstable fuel delivery
- Rough idle caused by inconsistent fuel pressure
- Fuel system performance issues in returnless setups
- Driveability concerns tied to pressure regulation
Installation Notes and Tips
Verify the vehicle uses a gas returnless fuel system before installation. Confirm the inlet and outlet configuration matches the original regulator, and follow the included caution sheet during service. For fitment, this part fits 2009-2010 Mazda 6, N/A.
Quality Assurance
Standard Ignition supplies this PR491 as a new replacement fuel injection pressure regulator for service use. Confirm part number PR491 and vehicle fitment before installation to ensure the correct application for your Mazda 6.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2010 | Mazda | 6 | 3.7L | V6 | N/A | — |
| 2009 | Mazda | 6 | 3.7L | V6 | N/A | — |
| No rows match your filter. | ||||||