ASE A8 Engine Performance Practice Test
26. A vehicle cranks but will not start. As the technician turns the ignition key, the security light flashes 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 lacks 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
