Fuel injector firing is being discussed. Technician A says SFI systems control each injector separately so that it fires just before the intake valve opens. Technician B says sequential injector firing is more accurate than multiport systems. Who is correct?

Question

Quizplus · Accepted Answer

Both statements are correct. SFI (Sequential Fuel Injection) systems do control each injector separately, allowing for precise timing of fuel delivery just before the intake valve opens. This makes sequential injector firing more accurate than multiport systems, where injectors may fire in groups rather than individually.

Fuel Injector Firing Is Being Discussed