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Which advantage does wasted spark have over a distributor?

  • A.Individual timing for each cylinder, which permits the ignition to be optimised for the condition of each in turn
  • B.No rotating high voltage parts to wear or leak
  • C.A higher spark energy, which follows from the coil serving only two cylinders rather than the whole engine
  • D.Lower cost only

Answer: B

Removing the cap, rotor and their tracking problems is the main gain. Coil energy does improve because each coil has more time to charge, which makes the second option a real accompanying benefit. Individual timing requires coil on plug. Tracing the requirement back to the physical constraint that produces it makes the answer follow. Reading the definition literally, rather than recalling a summary, avoids the usual confusion. Checking the units of each quantity catches a wrong formula before the arithmetic begins.

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