1991 GMC Syclone Knock Sensors

Carquest premium engine management products provide the right products for a wide range of domestic and import applications. Delivering the highest performance and durability under demanding conditions.

ACDelco GM Original Equipment Ignition Knock (Detonation) Sensors monitor the engine for pinging or spark knock, and are GM-recommended replacements for your vehicle’s original components. These sensors create a voltage signal based on the vibrations caused by erratic air/fuel mixture combustion; the engine control module uses these signals to adjust the ignition timing and air/fuel mixture. These original equipment ignition knock sensors have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Product Features:

• Sends signals to the engine control module (ECM) to adjust timing
• Helps prevent damage to the engine caused by pre-ignition
• GM-recommended replacement part for your GM vehicle’s original factory component
• Offering the quality, reliability, and durability of GM OE
• Manufactured to GM OE specification for fit, form, and function

Manufactured to meet or exceed OE requirements; Delphi Knock Sensors help maximize engine performance with all fuels; Delphi Knock Sensors prevent against engine damage from pre-ignition knocking.

Product Features:

• Delphi knock sensors help maximize engine performance with all fuels
• Delphi knock sensors prevent against engine damage from pre-ignition knocking
• Calibrated for a wide variety of frequencies to detect shifts, and adjust to provide accurate signals to help maximize engine performance
• Flat frequency response allows the same sensor to be used on different engines and the sensor responds to knock frequencies higher than the primary frequency
• Ground-isolated design with two-wire shielded harness helps protect the sensor signal from electro-magnetic interference (EMI)
• Self-generating piezoelectric design requires no power to the sensor

As a global leader in engine and powertrain management systems technology, Delphi manufactures a Flat Response Engine Knock Sensor that is 100 percent OE, providing an exact fit and superior quality. The Delphi Flat Response Knock Sensor has a flat frequency response over a range of from 1 to 18 kHz, thus the same sensor can be used on different engines by simply adjusting the filter frequency of the signal processing electronics to match the knock frequency of the engine. In addition, the sensor responds to knock frequencies higher than the primary knock frequency. This allows the higher knock frequencies to be used by a control system, either individually or combined with the primary knock frequency

Product Features:

• Self-generating piezoelectric design requires no power to the sensor
• Flat frequency response allows the same senor to be used on different engines and the sensor responds to knock frequencies higher than the primary frequency
• Ground-isolated design with two-wire shielded harness helps protect the sensor signal from electro-magnetic interference (EMI)
• Large mounting hole accommodates mounting bolts up to 10mm in diameter