While discussing EFI systems: Technician A says that the PCM provides the proper air-fuel ratio by controlling the fuel pressure. Technician B says that the PCM provides the proper air-fuel ratio by controlling injector pulse width. Who is correct? * 1 point a. Technician A b. Technician B c. Both A and B d. Neither A nor

While discussing EFI systems: Technician A says that the PCM provides the proper air-fuel ratio by controlling the fuel pressure. Technician B says that the PCM provides the proper air-fuel ratio by controlling injector pulse width. Who is correct? * 1 point a. Technician A b. Technician B c. Both A and B d. Neither A nor

Automotive Technology: A Systems Approach (MindTap Course List)

6th Edition

ISBN:9781133612315

Author:Jack Erjavec, Rob Thompson

Publisher:Jack Erjavec, Rob Thompson

Chapter28: Gasoline, Diesel, And Other Fuels

Section: Chapter Questions

Problem 4RQ: List five advantages the use of piezoelectric injectors has over solenoid-based injectors.

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Technician 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?
Name the parts of a fuel injector.
While discussing returnless fuel systems: Technician A says that in a returnless fuel system the pressure regulator is mounted on the fuel rail. Technician B says that in this type of fuel system the pump and pressure regulator are combined in one unit. Who is correct? A.Technician A B.Technician B C.Both A and B D.Neither A nor B
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1. The purpose of running this injector balance test is to determine which injector is restricted, inoperative, or delivering fuel differently than the other injectors. Replacing a complete set of injectors can be expensive. a. Describe the step involve in conducting injector balance test. b. Based on the recorded data on the power balance test in Table 1. Explain the condition on each injector. Table 1 Data collected from power balance test. Injector 1 2 3 Initial pressure (psi) 45 45 45 Second pressure 32 36 25 (psi)
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While discussing fuel boiling in the fuel rail: Technician A says that fuel boiling in the fuel rail causes a lean air-fuel ratio. Technician B says that the computer will compensate for the improper air-fuel ratio caused by fuel boiling in the fuel rail. Who is correct?
List five advantages the use of piezoelectric injectors has over solenoid-based injectors.
d. Check oil level & moisture content 19. If the main wire (coil) to the distributor and the coil to the switch are broken, replace them and make sure the connections are clean and tight relevant to a. Breaking system b. Ignition system c. Ventilation system d. Combustion system 20. The required gap in ignition system between---------- a.-4 to 5 b.-0.4 to 5 c.-0.4 to 0.5 d.-4 to 0,5 |21. Which of the following is the fouled of spark plug a. Soot b. Oil c. Over heated d. All of the above |22.The suitable thread of spark plug for heavy engine is a. M19 b. M18 c. M15 d. M16 23. Using a Torque wrench, tighten the plugs to the specified torque. (Most) 4mm plugs are torqued to four kilograms per square inch. a. True b. False 24. Start the engine and evaluate its performance refers to a. Weekly Maintenance b. Annually Maintenance c. Daily Maintenance d. None of them 25. Check to see if Dynamo is working properly. If necessary, adjust the regulator refers to a. Weekly Maintenance b. Annually…