Dorman 977-021 Fuel Injection Throttle Body

Overview of the Dorman 977-021 Electronic Throttle Body

The Dorman 977-021 electronic throttle body is designed for precise air and fuel delivery in gas-fueled vehicles. Engineered to meet OEM specifications, this throttle body is compatible with select Chevrolet, Pontiac, and Saturn models, ensuring reliable performance and efficient engine operation.

• Electronic throttle body with integrated throttle position sensor
• Includes idle air control motor for stable idle performance
• Constructed with durable aluminum and PBT housing materials
• Flanged inlet and outlet with 3.16-inch inlet diameter and 2.9-inch outlet diameter
• Blade-type electrical connector with 8 terminals for secure connection
• Compatible with Chevrolet Cobalt, Malibu, HHR, Pontiac G4, Pursuit, Ion, and Saturn Vue

Detailed Product Description

The Dorman 977-021 throttle body is an electronic component designed to regulate airflow into the engine's intake manifold. Featuring a 3.16-inch bore diameter and flanged inlet and outlet ports, it ensures a precise fit and optimal airflow. The throttle body includes an integrated throttle position sensor and idle air control motor, which work together to maintain smooth engine idling and accurate throttle response. Its housing is made from a combination of aluminum and PBT, providing strength and resistance to heat and corrosion. The electrical connection uses a blade-type connector with eight terminals, facilitating reliable communication with the vehicle's engine control unit.

Compatible Vehicles and Applications

This throttle body is compatible with gas-fueled models from Chevrolet, Pontiac, and Saturn, including:

• Chevrolet Cobalt
• Chevrolet Malibu
• Chevrolet HHR
• Pontiac G4
• Pontiac Pursuit
• Pontiac Ion
• Saturn Vue

Common Issues Addressed by the Dorman 977-021 Throttle Body

• Erratic or unstable engine idle
• Poor throttle response or hesitation during acceleration
• Check engine light related to throttle position sensor faults
• Reduced engine performance due to airflow inconsistencies
• Engine stalling or rough running conditions

Installation Notes and Tips

Installation of the Dorman 977-021 throttle body requires careful handling to avoid damage to the electronic components. Ensure the throttle body mounting surface is clean and free of debris before installation. Since no gasket or seal is included, use the original or a compatible replacement gasket to prevent air leaks. Electrical connectors should be securely attached to maintain proper sensor communication. Professional installation is recommended to ensure correct calibration and functionality.

Quality Assurance and Warranty

Dorman manufactures this throttle body to meet or exceed OEM standards, using quality materials such as aluminum and PBT for durability. The product includes an integrated idle air control motor and throttle position sensor to maintain engine performance. While specific warranty details are not provided here, Dorman typically offers limited warranties on their parts to cover defects in materials and workmanship.