Dorman 977-800 Fuel Injection Throttle Body

Overview of the Dorman 977-800 Fuel Injection Throttle Body

The Dorman 977-800 is a precision-engineered electronic fuel injection throttle body designed for select Buick and Cadillac models. This component ensures accurate airflow control and throttle response for vehicles such as the Buick Lucerne and Cadillac SRX.

• Electronic throttle body with integrated throttle position sensor
• Constructed from durable aluminum and PBT housing materials
• Inlet diameter of 3.42 inches with flanged connection
• Single outlet with a 3.85-inch non-flanged diameter
• Blade-type electrical connector with six terminals
• Compatible with gas fuel injection systems
• Natural silver finish for corrosion resistance

Detailed Product Description

The Dorman 977-800 fuel injection throttle body is designed to regulate the airflow into the engine's intake manifold electronically. Featuring a bore diameter of 3.82 inches and an airflow rate of 130, this throttle body supports efficient engine performance in gas-fueled vehicles. The unit includes a throttle position sensor to provide precise feedback to the engine control module, optimizing throttle response and fuel delivery. Its aluminum and PBT housing ensures durability and heat resistance, while the blade-type male electrical connector with six terminals facilitates secure and reliable connections.

Compatible Vehicles and Applications

This throttle body is compatible with the following makes and models:

• Buick DTS
• Buick Lucerne
• Cadillac SRX
• Cadillac STS
• Cadillac XLR

It is specifically designed for gas fuel injection systems and is not adjustable. Note that mounting hardware, gaskets, fuel injectors, and idle air control motors are not included with this unit.

Common Issues Addressed by the Dorman 977-800

• Irregular or poor throttle response
• Engine stalling or rough idling
• Check engine light related to throttle position sensor faults
• Reduced engine power or hesitation during acceleration
• Airflow inconsistencies affecting fuel efficiency

Installation Notes and Tips

Installation requires removal of the existing throttle body and replacement with the Dorman 977-800 unit. Since mounting hardware and gaskets are not included, ensure you have the necessary components before beginning installation. Proper electrical connection to the blade-type male connector with six terminals is essential for sensor functionality. It is recommended to follow vehicle-specific service manuals for torque specifications and calibration procedures after installation.

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 977-800 should be confirmed at the point of purchase, Dorman typically offers limited warranties covering defects in material and workmanship.