Detonation Sensor for Smooth, Protected Engine Performance

Keep your V8 running safe and strong. This OEM‑grade knock detector listens for engine ping (pre‑ignition) and instantly signals the ECU to trim ignition timing before damage occurs. Expect steadier idle, sharper throttle, improved fuel economy, and better catalytic converter life. Built with a sealed piezo element, corrosion‑resistant body, and stable output across extreme heat cycles.

Why you need it

High load, low‑octane fuel, towing, or carbon buildup can trigger knock. Without a reliable sensor, the ECU cannot control spark advance, risking pistons, rings, and bearings. A healthy knock sensor enables optimal power while preventing detonation.

How it works ⚙️

A piezoelectric crystal bolted to the block turns specific knock‑frequency vibrations into voltage. The ECU filters that signal by RPM and load, then adjusts timing per its maps. Correct mounting surface and torque matter: use a clean seat, proper spacer if required, and latch the connector fully to avoid noise in the signal line.

If it fails ❗

Typical signs: Check Engine (P0325/P0330),sluggish acceleration, poor MPG, ping under load, or timing stuck retarded. Long term, expect higher temps, elevated emissions, and catalyst stress. Replace in pairs on dual‑sensor engines and inspect the sub‑harness for heat damage.

Pro tips

Disconnect the battery, route wiring away from coils, never use sealant on the sensing face, and torque to spec. Clear codes, perform a warm road test, and confirm knock learn values with a scan tool.

Compatibility

• Qx56