The volumetric efficiency table is probably the most important one in any ECU.The vertical axis is engine load, in this case, ...

In Part 1, I regaled you all with the brief history behind the discovery of photochemical smog, and then proceeded to dazzle ...

When EVAP was first implemented, it was pretty straightforward. Fuel vapor was collected and stored in a charcoal canister and then purged back into the intake manifold when the engine was running.

Likewise, malfunctioning sensors (like the intake air temperature sensor, manifold absolute pressure sensor, or the exhaust gas recirculation sensor) can also skew the ECU's fuel calculations.

Air leaking into your car—not out of it—can be a problem. Popular Mechanics’s automotive experts outline the tools and techniques proven to smoke out even the toughest to find vacuum leaks.

Unlike the pump-fed water-injection systems on P-38 fighters, the AquaTune relies on intake manifold vacuum to pull distilled water from a plastic bottle and into the manifold.

As mentioned, the MAP sensor is usually located on the engine air intake manifold near the throttle body. As air passes through the manifold to reach the combustion chambers, the sensor collects ...

This paper presents software design and development of an Electronic Control Unit (ECU) for four cylinder petrol engine. The model designed in Simulink allows data from various sensors like speed ...