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What happens when you put petrol/gas in a diesel engine ?
The ping is caused by not enough fuel or to much advancement of the timing. The ping is the diesel effect. It is very bad for gasoline cars, there connecting rods, the rods that connect the pistons to the crank shaft are not built for that kind of firing, so many degrees before top dead center. So most car manufacturers do not tweak the amount of timing advancement very much. It is easier to just use a safe setting. Spark plugs can actually melt, if the engine pings to much.