Dorman 977-357 Fuel Injection Throttle Body

Overview of Dorman Fuel Injection Throttle Body 977-357

The Dorman 977-357 fuel injection throttle body is designed for precise electronic throttle control in select GM vehicles. Engineered with a cast aluminum housing and integrated throttle position sensor, this throttle body supports efficient fuel delivery for Buick, Chevrolet, Pontiac, and Saturn models.

• Electronic throttle body with integrated throttle position sensor
• Cast aluminum housing for durability and heat resistance
• Bore diameter of 2.535 inches for optimized airflow
• Blade-type electrical connector with female socket and 6 terminals
• Compatible with gas fuel systems
• Includes one fuel injection throttle body, no gasket or installation hardware

Detailed Product Description

The Dorman 977-357 throttle body is a direct replacement part designed to maintain proper air and fuel delivery in vehicles equipped with electronic throttle control systems. Its cast aluminum construction ensures strength and resistance to corrosion, while the metal finish provides durability under engine bay conditions. The integrated throttle position sensor allows for accurate monitoring of throttle plate position, essential for engine management systems to regulate fuel injection and idle speed effectively.

This throttle body features a bore diameter of 2.535 inches, which supports optimal airflow for the engine's fuel system. The electrical connection uses a blade-type female socket with six terminals, ensuring secure and reliable communication with the vehicle's electronic control unit. This part does not include fuel injectors, idle air control motor, or throttle body spacer, and it is not adjustable.

Compatible Vehicles and Applications

This Dorman fuel injection throttle body 977-357 is compatible with the following GM vehicles:

• Buick Regal
• Chevrolet Cobalt and HHR
• Pontiac G5 and Solstice
• Saturn Sky

It is designed specifically for gas fuel systems and electronic throttle control setups in these models, ensuring proper fit and function.

Common Issues Addressed by This Throttle Body

• Erratic or rough idle due to faulty throttle position sensor
• Poor throttle response or hesitation during acceleration
• Check engine light triggered by throttle body or sensor faults
• Reduced engine performance caused by air intake inconsistencies
• Throttle sticking or failure to open/close smoothly

Installation Notes and Tips

When installing the Dorman 977-357 throttle body, ensure the throttle body mounting surface is clean and free of debris. Since this part does not include a gasket or installation hardware, use the original components or purchase compatible replacements. Verify electrical connections are secure and free of corrosion. Calibration or relearning procedures may be required by the vehicle’s ECU after installation to ensure proper throttle response.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM specifications, providing reliable performance and durability. While specific warranty details for part number 977-357 should be confirmed at the point of purchase, Dorman typically offers limited warranties covering defects in material and workmanship.