8976644410 Original Excavator Isuzu 6UZ1 Engine Intake Pressure Sensor

Part number 8976644410 is an original intake pressure sensor (boost intake pressure sensor) specifically designed for the Isuzu 6UZ1 diesel engine. This sensor is a key sensing component of the engine electronic control management system, used to monitor the absolute pressure of the intake manifold after the turbocharger in real time, and convert the pressure signal into an electrical signal to send to the engine control unit (ECU). Based on this, the ECU accurately calculates the intake air quantity, thereby determining the basic fuel injection quantity and ignition advance angle. It is one of the core sensors to ensure engine power output and fuel economy. As an original standard component, it is mainly suitable for Hitachi's multiple hydraulic excavators equipped with Isuzu 6UZ1 engines, such as ZX130-5G, ZX160-5G, ZX190-5G, ZX210-5G, ZX240-5G and other models. To ensure its signal accuracy, response characteristics, and complete matching with the engine ECU calibration, and to avoid engine power reduction, black smoke, or fault codes (such as code 102-3/102-4) caused by signal misalignment, it is necessary to verify the specific model and serial number of the engine.

The original intake pressure sensor is the core pressure sensing component of the engine electronic control system. Its core function is to act as a "load sensor" for the engine, accurately measuring the absolute pressure inside the intake manifold (usually ranging from 20-250kPa), and converting physical pressure changes into linear 0.5-4.5V voltage signals to output to the ECU. As an original component, it usually adopts high reliability semiconductor varistor (silicon film) technology, which has the characteristics of fast response speed (typical value less than 0.2ms), high measurement accuracy (usually within ± 1.5%), and strong resistance to vibration and impact. Its sturdy metal casing, precise Wheatstone bridge circuit, and built-in temperature compensation function ensure long-term stable operation in high-temperature, high vibration, and oily environments of excavator engines. Its design is directly related to the precise control of air-fuel ratio by ECU, and is a key component that affects engine power, emissions, and fuel consumption.

The maintenance core of this intake pressure sensor lies in ensuring its signal accuracy, connection reliability, and cleanliness of the detection area. Regular inspection: It is recommended to visually inspect the sensor harness and connectors for looseness, damage, or oil stains, and check for air leaks at the intake manifold connections, in conjunction with regular maintenance every 500 working hours. Cleaning and replacement: If the sensor detection hole is blocked by oil stains or carbon deposits, special cleaning agents (such as electronic contact cleaner) can be used to carefully clean it. It is strictly prohibited to use sharp tools to scrape. When confirming that the sensor is damaged and needs to be replaced, it is necessary to operate it while the engine is cool and powered off. Disassemble it according to the maintenance manual requirements, and pay attention to the integrity of the sealing ring during installation and tighten it to the specified torque. After replacement, it is recommended to use a diagnostic tool to clear the fault code and perform necessary ECU learning initialization. As it is a precision electronic component, non professionals are not allowed to disassemble it without authorization.