The vehicle speed sensor or VSS measures transmission/transaxle output or wheel speed. The engine control module (ECM) uses this information to modify engine functions such as ignition timing, air/fuel ratio, … Continue Reading Velocity Check: What does a Vehicle Speed Sensor do?
The knock sensor creates a voltage signal based on the vibrations caused by engine detonation. The computer uses this signal to retard timing when spark knock occurs. Where are these … Continue Reading Combustion Control: What does a Knock Sensor do?
The Air Charge / Manifold Temperature sensor is used by the computer to measure air density for fuel mixture control. The computer uses this information to trim the air/fuel ratio … Continue Reading What does an Air Charge / Manifold Temperature Sensor do?
Camshaft and crankshaft sensors monitor the position of the engine’s crankshaft and camshaft by generating an electrical signal based on the position of the trigger wheel (variable reluctance sensor) or … Continue Reading What Are Camshaft and Crankshaft Sensors?
Up until the late 1980s, most cars had a fairly straightforward throttle control. You stepped on the accelerator pedal which was connected to a cable that actuated a mechanical linkage … Continue Reading What Is An Electronic Throttle Body?
The electronic control module is an onboard computer responsible for keeping your engine running at its best and alerting you when something is wrong.