Which sensor helps the ECU make decisions about fuel delivery during engine operation?

The correct response involves understanding the role each of these sensors plays in engine management. The Engine Control Unit (ECU) relies on a variety of sensors to gather data, which helps it optimize performance, efficiency, and emissions.

The temperature sensor measures the coolant temperature, helping the ECU determine the engine's operating temperature. This is crucial because fuel delivery can vary based on whether the engine is cold or warm.

The crankshaft position sensor monitors the position and rotational speed of the crankshaft. This information allows the ECU to accurately time fuel injection and ignition events, ensuring the engine runs smoothly at different speeds and loads.

The MAP (Manifold Absolute Pressure) sensor measures the pressure within the intake manifold. This measurement is vital for the ECU to assess engine load and determine the amount of fuel needed, since it directly influences the air-fuel mixture.

Since each of these sensors provides critical information that the ECU uses to make informed decisions about fuel delivery, the correct answer encompasses all three sensors. The use of multiple sensors allows for a more comprehensive approach to engine management, helping to optimize performance across various operating conditions.