On a vehicle with a speed density fuel injection system, which of the following is likely to occur with a vacuum leak?

Question

Quizplus · Accepted Answer

A vacuum leak in a speed density fuel injection system can lead to increased MAP (Manifold Absolute Pressure) sensor voltage because the sensor will detect a lower pressure in the intake manifold, interpreting it as more air entering the engine. This, in turn, causes the engine control unit (ECU) to calculate a higher engine load to compensate for the perceived increase in air, leading to adjustments in fuel delivery. Additionally, the vacuum leak can cause an increase in idle speed as the engine tries to stabilize by adjusting the air-fuel mixture to deal with the unmetered air entering through the leak.

On a Vehicle with a Speed Density Fuel Injection System