Automotive Technology: A Systems Approach (MindTap Course List)
6th Edition
ISBN: 9781133612315
Author: Jack Erjavec, Rob Thompson
Publisher: Cengage Learning
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Textbook Question
Chapter 34, Problem 8ASRQ
Technician A says that the AIR system should pump air into the exhaust manifold(s) during engine warmup. Technician B says that the secondary air system check valve can be checked with an exhaust gas analyzer. 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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Chapter 34 Solutions
Automotive Technology: A Systems Approach (MindTap Course List)
Ch. 34 - A rich air-fuel ratio causes HC emissions to...Ch. 34 - What will result from too little EGR flow? And...Ch. 34 - What can result from a charcoal canister that is...Ch. 34 - What happens if a PCV valve is stuck in the open...Ch. 34 - Explain why the I/M 240 and similar tests are...Ch. 34 - How do you test the efficiency of a secondary AIR...Ch. 34 - True or False? No-start, surging, or stalling can...Ch. 34 - List five common causes for high HC emissions.Ch. 34 - Describe carbon monoxide (CO) emissions in...Ch. 34 - A restricted catalytic converter can cause all of...
Ch. 34 - Which of the following statements about EVAP...Ch. 34 - As a catalytic converter begins to deteriorate,...Ch. 34 - How much pressure does a typical EVAP pressure...Ch. 34 - Which of the following exhaust gases is typically...Ch. 34 - Prob. 15RQCh. 34 - While discussing the proper way to test a...Ch. 34 - Prob. 2ASRQCh. 34 - While discussing catalytic converter diagnosis:...Ch. 34 - While discussing EGR valve diagnosis: Technician A...Ch. 34 - While discussing EGR valve diagnosis: Technician A...Ch. 34 - When discussing the diagnosis of a positive back...Ch. 34 - While diagnosing a PCV problem: Technician A says...Ch. 34 - Technician A says that the AIR system should pump...Ch. 34 - While discussing PCV system diagnosis: Technician...Ch. 34 - While discussing EVAP testing: Technician A says...
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- Describe the purpose of having both upstream and downstream oxygen sensors in an exhaust system.arrow_forwardDescribe the operation of the exhaust and fresh-air control.arrow_forwardWhile diagnosing a PCV problem: Technician A says that a stuck open PCV valve will cause a richer than normal air-fuel mixture. Technician B says that oil in the air cleaner assembly can be caused by worn piston rings. Who is correct? a. Technician A only b. Technician B only c. Both A and B d. Neither A nor Barrow_forward
- When the engine is idling, the pressure regulator in a PFI system provides ____fuel pressure compared to the fuel pressure at wide-open throttle.arrow_forwardWhich of the following statements about EVAP systems is not true? a. If the system is purging vapors from the charcoal canister when the engine is running at high speeds, rough engine operation will occur. b. Cracked hoses or a canister saturated with gasoline may allow gasoline vapors to escape to the atmosphere, resulting in gasoline odor in and around the vehicle. c. Rough idle, flooding, and other similar conditions can indicate a saturated canister. d. A vacuum leak in the system can cause starting and performance problems.arrow_forwardTechnician A says that a turbocharger has its own self-contained lubrication system. Technician B says that a turbocharger should not be operated when the engines oil pressure is lower than 30 psi. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor Barrow_forward
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- While discussing central port injection systems: Technician A says that CPI systems use one injector and several injector nozzles. Technician B says that CPI systems open each injector sequentially. Who is correct? A.Technician A B.Technician B C.Both A and B D.Neither A nor Barrow_forwardTechnician A says that air-fuel ratios can be regulated by controlling the “on time” of the injectors. Technician B says that the air-fuel ratio can be regulated by controlling the pressure applied to the individual injectors. Who is correct?arrow_forwardTechnician A says that excessively high pressure from an electric fuel pump can be caused by a faulty pressure regulator. Technician B says that the typical problem may be an obstructed return line. Who is correct?arrow_forward
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