Standard Ignition PR485 Fuel Injection Pressure Regulator

Fuel Pressure Control for 1989 Isuzu I-Mark

Standard Ignition PR485 is a fuel injection pressure regulator for gas systems, built to maintain the specified fuel pressure at 36 psi. It is listed for the 1989 Isuzu I-Mark and uses an angled nipple orientation for the application.

Key Features

• Fuel injection pressure regulator for gas fuel systems
• Operating pressure: 36 psi
• Angled nipple orientation for application-specific routing
• Includes caution sheet
• Standard Ignition PR485 replacement part

Application Details

Use Standard Ignition PR485 when servicing the fuel delivery system on a 1989 Isuzu I-Mark. This regulator helps control fuel pressure at the injector rail so the engine receives the pressure level specified for the system. This part cross-references Dorman OE Solutions 800-597 for the same application.

What This Part Helps Address

• Fuel pressure that is too high or too low
• Hard starting caused by unstable fuel delivery
• Rich or lean running conditions related to pressure regulation
• Fuel system drivability concerns on the Isuzu I-Mark
• Pressure control issues in a gas fuel injection system

Installation Notes and Tips

Verify the fuel system specification before installation and confirm the angled nipple orientation matches the original layout. Replace the regulator only after relieving fuel system pressure and inspect connected lines and seals for wear or contamination. Confirm fitment for 1989 Isuzu I-Mark, N/A, before final assembly.

Quality Assurance

Standard Ignition supplies this fuel injection pressure regulator as a direct replacement part for the listed application. The included caution sheet provides handling and service guidance during installation.