Standard Ignition AS91 Manifold Absolute Pressure Sensor

Reliable Manifold Absolute Pressure Sensor for Ford Vehicles

The Standard Ignition AS91 Manifold Absolute Pressure Sensor is designed to provide accurate pressure readings for Ford trucks, including the F-150, F-150 Heritage, and Ranger models. This sensor helps maintain optimal engine performance by monitoring manifold pressure and ensuring proper air-fuel mixture adjustments.

• Compatible with Ford F-150, F-150 Heritage, and Ranger models
• Part number AS91 for precise identification and fitment
• Measures manifold absolute pressure to support engine control systems
• Direct replacement sensor for emission control applications
• Manufactured by Standard Ignition, a trusted name in automotive sensors

Product Details and Functionality

The AS91 Manifold Absolute Pressure Sensor from Standard Ignition is engineered to accurately detect the pressure inside the intake manifold of Ford trucks such as the F-150 and Ranger. This data is critical for the engine control unit (ECU) to calculate air density and adjust fuel injection accordingly. Proper sensor function helps maintain engine efficiency, reduce emissions, and improve drivability. The sensor is designed to meet OEM specifications, ensuring reliable performance and compatibility with the vehicle’s emission control system.

Common Applications and Problem Resolution

This sensor is used primarily in emission control systems to monitor manifold pressure. It can help address several engine performance issues, including:

• Erratic engine idling or stalling
• Poor fuel economy due to incorrect air-fuel mixture
• Check engine light triggered by faulty pressure readings
• Reduced engine power or hesitation during acceleration
• Failed emissions tests related to sensor malfunction

Installation Notes and Tips

When installing the Standard Ignition AS91 sensor on compatible Ford F-150, F-150 Heritage, or Ranger models, ensure the engine is cool and the ignition is off. Disconnect the battery before removal to prevent electrical issues. Carefully unplug the old sensor and avoid damaging the wiring harness. Install the new sensor securely and verify all connections are tight. After installation, clear any diagnostic trouble codes and perform a test drive to confirm proper operation.

Quality Assurance and Warranty Information

Standard Ignition manufactures the AS91 Manifold Absolute Pressure Sensor to meet strict quality standards. Each sensor undergoes rigorous testing to ensure durability and accurate performance. This part is backed by a limited warranty, providing coverage against defects in materials and workmanship under normal use conditions.