Dorman 977-811 Fuel Injection Throttle Body

Overview of the Dorman 977-811 Fuel Injection Throttle Body

The Dorman 977-811 Fuel Injection Throttle Body is designed for reliable performance in select Nissan and Infiniti vehicles. This electronic throttle body ensures precise air and fuel delivery for optimal engine operation in models like the Nissan Altima and Infiniti QX60.

• Electronic throttle body with integrated throttle position sensor
• Constructed from durable aluminum and PBT housing materials
• 3.15-inch inlet diameter with flanged inlet and non-flanged outlet
• Compatible with gas fuel injection systems
• Includes a 6-pin male electrical connector for secure connection

Detailed Product Description

The Dorman 977-811 throttle body is engineered to meet the specifications of gas fuel injection systems found in Nissan and Infiniti vehicles such as the Murano, Pathfinder, and Quest. Featuring a natural finish and an aluminum throttle body with an aluminum/PBT housing, this unit provides durability and consistent performance. The throttle body includes a throttle position sensor to monitor throttle valve position, ensuring accurate engine control. It has a single inlet and outlet, with a 3.15-inch bore diameter and a 2.75-inch outlet diameter, designed for efficient airflow. The electronic design supports precise throttle response, improving drivability and fuel efficiency.

Compatible Vehicles and Applications

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

• Nissan Altima
• Nissan JX35
• Nissan Murano
• Nissan Pathfinder
• Nissan Quest
• Infiniti QX60

It is intended for use in gas fuel injection systems and is not adjustable. The part number 977-811 should be referenced to ensure proper fitment.

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 malfunctions
• Reduced engine performance caused by air intake inconsistencies
• Throttle sticking or failure to open/close properly

Installation Notes and Tips

Installation of the Dorman 977-811 throttle body requires removal of the existing throttle body unit. Note that mounting hardware and gaskets are not included and must be sourced separately. Ensure all electrical connections, including the 6-pin male connector, are securely attached. It is recommended to inspect and clean the throttle body mounting surface before installation to prevent air leaks. Calibration or relearn procedures may be necessary after installation to ensure proper throttle response.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 977-811 throttle body undergoes rigorous quality control to ensure durability and reliable operation. While specific warranty details are not provided here, Dorman typically offers limited warranties on their replacement parts. Refer to the product packaging or Dorman’s official documentation for exact warranty terms.