Auto Trader NZ
Published 21 February 2025
Ever heard a rattling or knocking noise from your engine, especially when accelerating? That could be pinging or detonation. It’s an issue that can harm your engine if ignored.
What is Pinging (Detonation)?
Pinging happens when fuel in the engine’s cylinders ignites unevenly, causing pressure spikes. This creates a knocking sound and can lead to damage.
Causes of Pinging
Common causes include:
- Low-Octane Fuel – Using lower-octane fuel than recommended can lead to early ignition.
- Incorrect Ignition Timing – If the spark plug fires too soon, it can cause knocking.
- Overheating – High temperatures can cause fuel to ignite too early.
- Lean Fuel Mixture – Not enough fuel in the mix can make combustion unstable.
- Carbon Build-Up – Deposits in the engine can increase pressure and cause knocking.
- Faulty Knock Sensor – If this sensor fails, the engine won’t adjust timing properly.
Why is Pinging Bad?
Long-term pinging can cause:
- Piston and Cylinder Damage – Can lead to cracks or holes.
- Broken Engine Parts – Stress can damage rods and other components.
- Overheating – Detonation increases engine temperature and risks further damage.
How to Prevent Pinging
✔ Use the Right Fuel – Check your car manual for the correct octane rating. ✔ Maintain Cooling System – Keep your radiator and fans working well. ✔ Clean Your Engine – Regular servicing prevents carbon build-up. ✔ Check Timing – Ensure ignition timing is correct. ✔ Fix Fuel Issues – Faulty sensors or injectors can cause lean fuel mixtures.
Final Thoughts
If your engine knocks, don’t ignore it! Using the right fuel and maintaining your car can prevent costly damage. Stay on top of servicing to keep your engine running smoothly.
