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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 diagnosing the cause of high HC and O2 emissions: Technician A says that the HC may be elevated because of an ignition problem. Technician B says that the O2 may be elevated because of an ignition problem. Who is correct?

a. Technician A only

b. Technician B only

c. Both A and B

d. Neither A nor B

To determine

The correct technician among A and B who are diagnosing the cause of high HC and O2 emissions

Explanation

The high HC emission can be due to the reason of un-burnt fuel mixture which is the residual part of incomplete combustion. This un-burnt mixture is a result of ignition system misfiring and this misfiring in turn stops the flame front before it ignites the mixture which makes some fuel mixture to be un-burnt. This implies that technician A is correct.

The presence of high oxygen in emission implies that there is incomplete combustion...

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