Automotive Technology: A Systems A...
Solutions
Automotive Technology: A Systems A...
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
The technician with correct approach in diagnosing EGR valve.
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...
Chapter 34 Solutions
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