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Automotive Technology: A Systems A...

6th Edition
Jack Erjavec + 1 other
ISBN: 9781133612315

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BuyFindarrow_forward

Automotive Technology: A Systems A...

6th Edition
Jack Erjavec + 1 other
ISBN: 9781133612315
Textbook Problem

While discussing electronic fuel injection principles: Technician A says that the PCM always adjusts the air-fuel ratio in response to the signals. Technician B says that cold air is dense, which is why the PCM enriches the mixture when the engine is cold.

Who is correct?

a. Technician A

b. Technician B

c. Both A and B

d. Neither A nor B

To determine

Whether Technician A or Technician B is correct.

Explanation

The oxygen sensor (O2S) senses the air-fuel mixture. More fuel is injected when the sensor senses a lean mixture otherwise less fuel volume will be introduced into the combustion engine.

The Intake Air Temperature (IAT) sensor senses the inlet air temperature...

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