Dorman 977-078 Fuel Injection Throttle Body

Overview of the Dorman 977-078 Fuel Injection Throttle Body

The Dorman 977-078 electronic fuel injection throttle body is designed specifically for Toyota Prius models. Engineered with durable aluminum housing and a precise throttle position sensor, this throttle body ensures reliable air and fuel delivery for optimal engine performance.

• Electronic throttle body with integrated throttle position sensor
• Constructed from durable aluminum with black and gray finish
• Inlet diameter: 2.1 inches; outlet diameter: 1.84 inches
• Non-flanged inlet and outlet types for direct fitment
• Compatible with gas fuel injection systems
• Blade-type electrical connector with 4 terminals
• Single inlet and outlet configuration

Detailed Product Description

The Dorman 977-078 throttle body is an electronic component designed to regulate airflow into the engine's intake manifold for Toyota Prius vehicles. Featuring a 1.91-inch bore diameter, this throttle body is constructed from aluminum, providing strength and heat resistance. The unit includes a built-in throttle position sensor to accurately monitor throttle plate position, which is essential for precise fuel injection and engine control. The black and gray finish offers corrosion resistance and a clean appearance under the hood. This throttle body is designed with non-flanged inlet and outlet ports, measuring 2.1 inches and 1.84 inches respectively, ensuring compatibility with the Prius fuel injection system. The electrical connection uses a male blade-type terminal with four contacts, facilitating secure and reliable communication with the vehicle's engine control unit.

Common Applications and Problem Resolution

• Restores proper throttle response and engine idle control
• Resolves issues related to throttle position sensor failure
• Addresses rough idling or stalling caused by faulty throttle body
• Improves fuel efficiency by ensuring accurate air-fuel mixture
• Eliminates check engine light codes related to throttle body malfunction

Installation Notes and Tips

Installation of the Dorman 977-078 throttle body requires removal of the existing throttle body from the intake manifold. Note that mounting hardware and gaskets are not included and should be reused or replaced as necessary. Ensure all electrical connections are secure and free of corrosion. It is recommended to perform a throttle body relearn procedure after installation to calibrate the electronic throttle control system for optimal performance.

Quality Assurance and Warranty

Dorman manufactures this throttle body to meet or exceed OEM specifications for fit, form, and function. The aluminum housing and integrated throttle position sensor undergo rigorous quality control to ensure durability and reliability. While specific warranty details are not provided here, Dorman products typically come with a limited warranty covering defects in materials and workmanship.