Walker 255-1164 Fuel Injection Pressure Regulator

Fuel Pressure Control for Mazda 929

Walker Products 255-1164 is a fuel injection pressure regulator for select 1990-1991 Mazda 929 applications. It is built for drivers and technicians replacing a worn regulator in a fuel injection system that needs stable fuel pressure and consistent engine operation.

Walker Products has supplied fuel system components since 1946 and manufactures engine management parts to meet or exceed OEM standards and specifications. The Walker Products line includes fuel injection repair components, sensors, injectors, and related fuel system parts backed by in-house engineering and product support.

Key Features

• Fuel injection pressure regulator for select Mazda 929 models
• Walker Products part number 255-1164
• Built to meet or exceed OEM standards and specifications
• Supports consistent fuel delivery in the injection system
• Cross-references DNJ PR193 and Standard Ignition PR484 for the same application

Application Details

Fits 1990-1991 Mazda 929, N/A. This part number 255-1164 is listed for the Mazda 929 in the 1990 and 1991 model years, making it a direct-fit service part for the specified application. Use 255-1164 when replacing the original fuel injection pressure regulator on the confirmed vehicle fitment.

What It Helps Address

• Fuel pressure that is too high or too low
• Rough idle caused by unstable fuel delivery
• Hard starting related to fuel system pressure control
• Rich or lean running conditions from regulator wear
• Fuel trim issues tied to inconsistent injector pressure

Installation Notes

Verify the vehicle year and model before installation. Inspect the fuel system for contamination, damaged hoses, or related wear before replacing the regulator. Confirm the regulator matches the original application and follow the vehicle service manual for fuel system depressurization and installation procedures.

Quality Assurance

Walker Products is an ISO 9001/IATF16949 certified manufacturer with long-standing experience in fuel system components and engine sensors. The company states that its parts are produced to meet or exceed OEM standards and are supported by manufacturing, engineering, and technical documentation resources.