ASE A8 Engine Performance Practice Test
26. A vehicle cranks but will not start. As the technician turns the ignition key, the security light continues to flash slowly. Which of these is the MOST likely cause of this condition?
- A. The transponder.
- B. A faulty PCM.
- C. No power to the fuel injectors.
- D. A dead battery.
27. After replacing a leaking fuel injector on an engine with fault code P0172, indicating a rich air-fuel ratio, the engine is still backfiring and has a lack of power. Technician A says the rich air-fuel mixture could have clogged the catalytic converter. Technician B says to use a vacuum gauge to diagnose a restriction in the exhaust system. Who is correct?
- A. Technician A
- B. Technician B
- C. Both A and B
- D. Neither A or B
28. Two technicians are discussing OBD II code P0301. Technician A says the P in the code stands for the powertrain. Technician B says the 0 in the code means it is manufacturer-specific. Who is correct?
- A. Technician A
- B. Technician B
- C. Both A and B
- D. Neither A or B
29. Component A in the schematic diagram above is:
- A. A splice in the ground circuit for MAP sensor.
- B. A splice in the signal circuit for MAP sensor.
- C. A connection in the signal circuit for MAP sensor.
- D. A connection in the reference circuit for MAP sensor.
30. A vehicle with an EFI engine frequently stalls while stopping and turning. Sometimes it takes several tries to restart. Technician A says a loose connection at the crankshaft position sensor would result in this condition. Technician B says an open in the crankshaft position sensor circuit could be the cause. Who is correct?
- A. Technician A
- B. Technician B
- C. Both A and B
- D. Neither A or B
