The primary purpose of the Acura MDX Intake Manifold Temperature Sensor is to transmit precise information to the powertrain control module. This helps maintain a balanced mixture of air and fuel in the engine. Cooperating with airflow information, this Intake Manifold Temperature Sensor allows the PCM to adjust injector on-time so cylinders receive the correct ratio for smooth acceleration and steady idling. Should dirt and grime cover the sensitive element of the Intake Manifold Temperature Sensor, it may misread the conditions, causing hesitation and possibly even stalling in the engine and mixtures that run rich or lean. A trouble code may also set off the check engine light. Because unmetered air passing the Intake Manifold Temperature Sensor alters the ratio, Acura drivers should ensure the intake tract is sealed and has no vacuum leaks when symptoms appear. As the routine checks keep the current Acura powertrains healthy, the same must also be true of the modern engine in the MDX. The early Acura models applied a vane-type unit, which could lead to sticky issues because of contamination of the door. The newer MDX systems use a hot-wire type that removes the door, leading to faster and more precise feedback. Though designs have evolved, the Intake Manifold Temperature Sensor in any MDX continues to perform essentially the same monitoring that safeguards fuel economy and overall performance.
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