Mindtap For Erjavec/thompson's Automotive Technology: A Systems Approach, 4 Terms Printed Access Card (mindtap Course List)
7th Edition
ISBN: 9781337794381
Author: Jack Erjavec, Rob Thompson
Publisher: Cengage Learning
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Textbook Question
Chapter 31, Problem 6SA
What are three possible problems that can allow fuel pressure to rapidly bleed down once the engine is shut off?
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Chapter 31 Solutions
Mindtap For Erjavec/thompson's Automotive Technology: A Systems Approach, 4 Terms Printed Access Card (mindtap Course List)
Ch. 31 - List four service precautions for working on the...Ch. 31 - What is indicated by a LTFT reading of 24 percent?Ch. 31 - Describe how testing GDI fuel systems differs from...Ch. 31 - What is the difference between the pulse width and...Ch. 31 - How can you use a dual trace scope to make sure...Ch. 31 - What are three possible problems that can allow...Ch. 31 - What is the purpose of having two accelerator...Ch. 31 - What is indicated by a negative LTFT value?Ch. 31 - What problem may result from dirt buildup on an...Ch. 31 - What is the difference between STFT and LTFT?
Ch. 31 - True or False? The signals from an air-fuel ratio...Ch. 31 - Prob. 2TFCh. 31 - Which of the following is the most likely cause of...Ch. 31 - The PCM checks for a closed throttle plate each...Ch. 31 - Which of the following would not cause a...Ch. 31 - While discussing the causes of...Ch. 31 - While discussing IAC valve diagnosis: Technician A...Ch. 31 - While discussing IAC motor removal, service, and...Ch. 31 - While discussing injector testing: Technician A...Ch. 31 - While discussing airflow sensors: Technician A...Ch. 31 - While discussing scan tool diagnosis of fuel...Ch. 31 - While discussing a high idle speed problem:...Ch. 31 - While discussing the causes of a rich air-fuel...Ch. 31 - While diagnosing an idle speed problem: Technician...Ch. 31 - While looking at fuel trim values: Technician A...
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- Which of the following is not one of the strokes of a four-cycle engine? Compression Exhaust Intake Ignitionarrow_forwardWhich of the following is not accomplished by the fuel and air system of a gasoline engine? Stores the fuel for later use Collects and cleans the outside air Delivers fuel to a device that will control the amount of fuel going to the engine Keeps the fuel and air ratio constant regardless of the conditions under which the engine is operatingarrow_forwardWhile discussing GDI systems: Technician A says that this type of system allows engines to run at very lean air-fuel ratios and at higher-than-normal compression ratios. Technician B says that GDI systems eliminate the need to have an EGR valve on the engine. Who is correct?arrow_forward
- While discussing GDI systems: Technician A says this type of system allows engines to run at very lean air fuel ratios and at higher than normal compression ratios. Texhnician B says that GDI systems eliminate the need to have an EGR valve on the engine. Who is correct?arrow_forwardTechnician A says that only offshore engines are permitted to use port-helix metering fuel systems on EPA MY 2010 compliant and later engines. Technician B says that port-helix metering injection pumps can be used on current diesel engines when the peak power rating is less than 70 BHP (52 kW). Who is correct?arrow_forward2- Explain the differences and similarities between the engine temperature sensitivity and the incoming air temperature, and how do they affect the balance of the injected fuel volume determined by the electronic control unit?arrow_forward
- What are the major components of a Piston Engine fuel System What are their major functions or roles within the systemarrow_forwardWhich of the following best approximates pressure variations in an internal combustion engine? Diesel Cycle O Otto Cycle O Dual Cyclearrow_forwardHow do the volumetric efficiency and air-fuel ratio change as the engine's rotational speed changes? With a brief explanation of the change process with an explanation of the reasonsarrow_forward
- What are the major pollutants from the exhaust of SI and CI engines.arrow_forwardWhich of the following is not a true statement about diesel engines?a. The operation and main components of a diesel engine are comparable to those of a gasoline engine. Diesel and gasoline engines are available as four- stroke combustion cycle engines. Diesel engines rely on glow plugs instead of spark plugs to initiate ignition. The compression ratio of diesel engines is typically three times that of a gasoline engine.arrow_forwardWhich of the following is an expression of how much of the heat formed during the combustion process is available as power from the engine? Mechanical efficiency Engine efficiency Volumetric efficiency Thermal efficiencyarrow_forward
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