Standard Ignition PR4 Fuel Injection Pressure Regulator

Fuel Pressure Control for GM Applications

Standard Ignition PR4 is a fuel injection pressure regulator built for gas-powered applications that need stable fuel delivery and consistent engine performance. Its application-specific design supports proper fit and form for select Buick, Oldsmobile, and Pontiac vehicles, including LeSabre, Delta 88, Bonneville, Riviera, and Firebird models.

Built with leakage resistance in mind, the PR4 helps maintain the correct fuel pressure at the rail so the engine can respond as expected under load, idle, and acceleration. This Standard Ignition PR4 fuel injection pressure regulator is a direct-fit service part for select 1985-1991 GM applications.

Key Features

• Fuel injection pressure regulator for gas fuel systems
• 44 psi operating pressure
• Straight nipple orientation
• Application-specific fit and form
• Engineered for improved resistance to leakage
• Includes caution sheet

Detailed Description

The Standard Ignition PR4 is designed to regulate fuel pressure in the injection system so the engine receives the pressure level required for proper operation. Accurate pressure control is important for drivability, fuel delivery consistency, and overall engine performance. This part number is used across select GM platforms, including 1986 and 1988-1991 Buick LeSabre, 1986 and 1988-1991 Oldsmobile Delta 88, and 1988-1991 Pontiac Bonneville applications.

This part cross-references Dorman - OE Solutions 800-114 for the same application. Standard Ignition PR4 also cross-references Gates 21011 for the same application.

Common Symptoms This Part Can Address

• Fuel pressure that is too high or too low
• Rough idle caused by inconsistent fuel delivery
• Hard starting related to pressure regulation issues
• Fuel odor or seepage around the regulator area
• Poor throttle response under acceleration

Installation Notes and Tips

• Verify the vehicle’s fuel system requirements before installation.
• Confirm the straight nipple orientation matches the original part.
• Inspect fuel lines, seals, and related components for wear before reassembly.
• Relieve fuel system pressure before removing the existing regulator.
• Use the included caution sheet during installation and service.

Quality Assurance

Standard Ignition manufactures this regulator with control over the process from components through finished product. That manufacturing approach supports consistent construction and application-specific fit for select Buick, Oldsmobile, and Pontiac fuel injection systems.