All of the following would most likely cause black smoke to emit from the exhaust pipe EXCEPT a ____.
A) shorted IAT sensor
B) faulty temperature sensor
C) defective fuel pressure regulator
D) defective MAP sensor

Question

Quizplus · Accepted Answer

A shorted IAT (Intake Air Temperature) sensor typically would not cause black smoke from the exhaust. Black smoke is usually a sign of too much fuel being burned, which could be caused by issues like a defective fuel pressure regulator (C) or a defective MAP (Manifold Absolute Pressure) sensor (D), as they directly affect fuel mixture. A faulty temperature sensor (B) could also lead to incorrect fuel mixtures. However, a shorted IAT sensor would more likely affect the air-fuel mixture by providing incorrect air temperature data, but it's less directly associated with causing rich conditions that lead to black smoke compared to the other options.

All of the Following Would Most Likely Cause Black Smoke