ASE A8 Practice Test

What is the first thing to do while diagnosing an engine performance issue?

Technician A believes that paper service manuals still get used today. Technician B believes that you should always follow recommended service procedures found in online service information.

Who is correct?

When you look for vehicle information specifically for a customer, what data do you need to know?

Using a diagnostic strategy to look into a drivability concern, you would want to do which of these steps last in the process?

Which of these is an unapproved way to obtain DTC?

Technician A believes that when the ignition coil is failing, the engine might misfire under load. Technician B believes the pickup coil must have dielectric grease under it.

Who is correct?

The 12-volt test light connects to ground from the negative primary coil terminal on an electronic DI system. This light flutters when the engine cranks.

A spark tester also doesn’t fire when connected to ground from the coil secondary wire while the engine cranks. Which is the MOST likely explanation?

The least likely reason to experience blue exhaust emissions is:

A scan tool checks fuel injector balance. When operating on standard procedure, what would be the expected result when the injector is functioning properly?

Evaporative emission system failure causes several symptoms. Which of these is least likely to occur?

When discussing an inoperative PCV system, all of these apply EXCEPT:

The OBD II system on a vehicle reads a spark plug misfire that might damage the three-way catalyst. Which trip will the PCM or EMC most likely turn on the MIL?

Technician A states that the onboard self-diagnostics test mode procedure must be done with a cold engine. Technician B states that DTC will monitor items only once the engine is in closed loop.

Who is correct?

A technician is working on the engine shown below. It was brought in after running poorly and eventually not starting. The technician detects a misfire and wants to inspect the ignition system.

Which component should they check for carbon buildup which would cause these symptoms?

A cylinder power balance test will tell a technician what about the engine?

Which of the following issues is the least likely to cause catalyst material inside the catalytic converter to fail and break apart?

A technician is diagnosing a vehicle that came in with a rough idle. Upon further inspection, they discover the EGR valve is stuck in the open position.

Why does this have any effect on engine idle?

Technician A is scanning a vehicle with the scan tool shown below. Technician B reminds them that they need to allow the vehicle to reach normal operating temperature before running computerized tests.

Why is testing for DTCs once the engine has warmed up a vital step in using the vehicle’s onboard diagnostic system?

Source

Which of the following components are tested by noncontinuous monitors?

The port below is going to be essential for diagnosing any model made after________.

Source