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Above also similar to 3rd diagram is a coil over ignition system which each spark plug would be using their own coil , and sometimes even their own ignition module (darlington pair ) built in one and located on top of each spark plug .
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Above is a wasted spark ignition system consisting of function generator to trigger the module , and darlington pair (ignition module) wasted spark coil and 2 spark plugs.
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Above is an ignition module (darlington pair) functin generator to trigger the module , coil and a spark plug .
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Above we have an ignition module (darlington pair) disributor to trigger the module , coil and a spark plug .
On the second figure the connection between the two coils is unnecessary. The spark plug on the right won't work.
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