Technician a Says an SFI Is More Efficient Than an MFI

Technician A says an SFI is more efficient than an MFI injection because fuel is injected only when the intake valve is open, so the fuel can't condense when the intake valve is closed. Technician B says an MFI injection system can shut down the injector for a misfiring cylinder, preventing catalytic converter overheating. Who is correct?

A) A only
B) B only
C) both A and B
D) neither A nor B

Correct Answer:

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