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When discussing the diagnosis of a positive back pressure EGR valve: Technician A says that with the engine running at idle speed, if a hand pump is used to supply vacuum to the EGR valve, the valve should open at 12 in. Hg of vacuum. Technician B says that with the engine not running, any vacuum supplied to the EGR valve should be bled off and the valve’s diaphragm should not move. Who is correct? a. Technician A only b. Technician B only c. Both A and B d. Neither A nor B

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Automotive Technology: A Systems A...

6th Edition
Jack Erjavec + 1 other
Publisher: Cengage Learning
ISBN: 9781133612315
BuyFind

Automotive Technology: A Systems A...

6th Edition
Jack Erjavec + 1 other
Publisher: Cengage Learning
ISBN: 9781133612315

Solutions

Chapter
Section
Chapter 34, Problem 6ASRQ
Textbook Problem

When discussing the diagnosis of a positive back pressure EGR valve: Technician A says that with the engine running at idle speed, if a hand pump is used to supply vacuum to the EGR valve, the valve should open at 12 in. Hg of vacuum. Technician B says that with the engine not running, any vacuum supplied to the EGR valve should be bled off and the valve’s diaphragm should not move. Who is correct?

a. Technician A only

b. Technician B only

c. Both A and B

d. Neither A nor B

Expert Solution
To determine

The technician with correct approach in diagnosing EGR valve.

Explanation of Solution

Given:

Technician A says that with the engine running at idle speed, if a hand pump is used to supply vacuum to the EGR valve, the valve should open in 12 in. Hg of vacuum.

Technicians B say that with the engine not running, any vacuum supplied to the EGR valve should be bled off and the valve’s diaphragm should not move...

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Chapter 34 Solutions

Automotive Technology: A Systems Approach (MindTap Course List)
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