Technician A says that open loop fuel systems have no way of detecting whether the amount of fuel delivered was ideal for the driving conditions. Technician B says that closed loop systems use oxygen sensors to provide feedback to the PCM. Who is correct?

Question

Quizplus · Accepted Answer

Technician A is correct in stating that open loop fuel systems do not have the ability to detect whether the amount of fuel delivered is ideal for driving conditions. This is because they operate based on pre-programmed fuel injection maps and do not use sensors to adjust fuel delivery in real-time.

Technician B is also correct in stating that closed loop systems use oxygen sensors to provide feedback to the PCM. This feedback allows the PCM to adjust fuel delivery in real-time to maintain ideal air/fuel ratios and reduce emissions.

Technician a Says That Open Loop Fuel Systems Have No