Standard Ignition TJ25 Fuel Injector

Fuel Injector for TBI Applications

Standard Ignition TJ25 is a remanufactured TBI fuel injector built for stable fuel delivery and smooth engine operation. It is listed for 1989-1993 Chevrolet Caprice and 1991-1993 Chevrolet Commercial Chassis applications, including police package and U.S. emissions configurations.

Designed for gas-fueled throttle body injection systems, this injector uses a 2-pin male terminal connection and a black housing. Standard Ignition TJ25 is a direct-fit fuel injector choice for Chevrolet Caprice and Chevrolet Commercial Chassis service work where consistent injector response matters.

Key Features

• Remanufactured fuel injector for TBI and system type TBI applications
• Flow-matched design for balanced fuel delivery
• Electro discharge machining for precise fit and performance
• Precision wound and trimmed solenoid windings for controlled fuel delivery
• High-temp Viton O-rings for sealing under elevated heat conditions
• Black body with male pin terminals and 2-terminal connection

Detailed Description

Standard Ignition TJ25 is engineered for throttle body injection systems that require accurate fuel metering and dependable electrical response. The remanufactured design reflects Standard Ignition’s control over the manufacturing process from component selection through finished product, helping maintain consistent injector quality for service replacement. This part cross-references DENSO Auto Parts 221-9376 for the same application.

For Chevrolet Caprice and Chevrolet Commercial Chassis vehicles, TJ25 supports restoration of proper injector function when the original unit is no longer delivering fuel evenly. The flow-matched construction and precision solenoid winding help the engine computer command fuel delivery more efficiently, while the Viton sealing components are selected for heat resistance in demanding underhood conditions.

What It Helps Fix

• Rough idle caused by uneven fuel delivery
• Hard starting related to injector wear or poor spray consistency
• Fuel trim issues from inconsistent throttle body injection output
• Excess fuel consumption tied to a failing injector
• Emissions concerns caused by poor injector performance

Installation Notes and Tips

Verify the vehicle’s fuel system uses TBI and confirm the connector style before installation. Match the application to the listed fitment: Fits 1989-1990 Chevrolet Caprice, N/A; Fits 1991-1993 Chevrolet Caprice, N/A, Police Package; New; Fits 1991-1993 Chevrolet Commercial Chassis, N/A, w/ U.S. Emissions; New. Confirm all sealing surfaces are clean and inspect the fuel system for contamination before replacing the injector.

Quality Assurance

Standard Ignition manufactures this injector with controlled component-to-finished-product oversight and application-focused remanufacturing standards. The TJ25 is built to address common failure points found in original equipment injectors and to deliver consistent performance in the listed Chevrolet applications.