Magic Elixir is my stupid way of saying a de-coke additive. Try some Caltex Techron 5000, bung a whole can in the petrol tank (near empty) and fill up. This should clean out any carbon that may be causing the ping.
This is from their website:
Techron 5000 is a unique fuel system cleaning and decoking agent based on powerful synthetic cleaning additives.
Techron 5000 provides a burst of cleaning power that is unbeatable at cleaning the entire fuel system restoring power and performance in petrol and light duty direct injection diesel engines.
Had a same problem with XB clevo, mainly due to the crap fuel they give us these days, fitted Lumation electronic ignition module, and a set of Splitfire plugs, the plugs are expensive $12ea, definatly worth it, fixed my problems ..
Hi, 92bigbronco suggested retarding the timing, have you done that yet, or checked the timing? Thats very important and will definatly stop the pinging, but at the cost of losing some power.
Topghia had another good suggestion, but use a cleaner that is applied directly into the intake manifold vacuum hose, follow directions on can. If you use it right it will make the car smoke for about 15 minutes when restarted after cleaning.
You already claim to be putting in a high octane petrol.
Here's a few other things to check, cooling system must be in good shape, not running hot. oil level, stuck heatriser if equipped, stuck thermostatic aircleaner.
Does it have a egr valve? i dont think so?
Is it running lean? Hows the fuel filter?
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