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Which system dispenses with the distributor entirely?

  • A.Electronic ignition, which replaces the contact breaker but retains the distributor for the high voltage delivery
  • B.Magneto ignition
  • C.Coil on plug ignition, in which each cylinder has its own coil mounted directly above the spark plug of that cylinder
  • D.Distributorless ignition with coil packs

Answer: D

Distributorless systems use one coil per pair of cylinders and fire them together, removing the rotating high voltage parts. Coil on plug is the further development of the same idea, which makes the last option a real system rather than a wrong one. The order in which the effects act is what decides the outcome, so it is worth establishing first. The shared behaviour explains why these belong together and the differences explain why both exist.

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