An engine will begin to ping at a relatively rapid pace when the fuel grade gets too low in its octane rating. A pinging noise in the engine can also indicate the need to repair the part of the car that tells the coil when to fire the cylinder. You might have carbon build-up in the combustion chamber.

How do you know if your engine is pinging?

if your engine is pinging,you will hear this pinging noise easiest by putting your car in 3rd or 4th at about 30km/h and putting the accelerator all to the floor. try to get it so the car isnt jumping and making noise,its just under a heap of load,struggling to accelerate but not getting anywhere.

Is some engine pinging normal?

Pinging or spark knock has been around ever since the internal combustion chamber engine was invented. But that doesn't mean it is necessarily good. This is the sound you may occasionally hear when you put a strain on the engine. In this case, it shouldn't cause any trouble.