Hi, I have this 1978 Holden Kingswood with a Straight 6 202 3.3L motor, 3 spd auto. At higher engine RPM (whether driving or in park) I get a light rapid tapping sound and then an abrubt tick (please listen to the audio below). I want to know is this sound engine detonation, pinking, etc. I am currently using a tank that has about 30 litres of 98 fuel octane and about 40 litres of 95 octane fuel and set to 6 degrees BTDC on timing, but from memory- it did it on a pure tank of either fuel. I am also using a lead replacement additive. Does this sound like pinking? It also did it on 3 degrees BTDC timing too.
Turn up your headphones, speakers etc. and you should be able to hear it over the engine revving.
https://drive.google.com/file/d/1V9WLbYeK1js9sP0_C34LsRU1KlYGlAfW/view?usp=sharing
Sorry- around 232,800 kilometers on the odometer.
That link doesn't work so make a YouTube video post that and give me the URL they always work
Hi Scotty, here it is. It's a blank screen as it's only an audio file- if you need more, happy to run some tests for you.