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Which reason favours cutting fuel rather than spark at the limiter?

  • A.No reason
  • B.Fuel cut is smoother and protects the after treatment, whereas spark cut sends raw fuel into the exhaust system
  • C.Unburnt fuel would damage the catalyst
  • D.Cutting the spark is slower, which prevents the limiter from acting quickly enough to protect the engine from damage

Answer: C

Spark cut sends raw mixture into the exhaust where it ignites and melts the catalyst. The last option states both parts of that reasoning, which makes it a correct and fuller version of the same answer. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision. The shared behaviour explains why these belong together and the differences explain why both exist. Checking which component actually carries the load settles most questions of this kind at once.

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