Science In Daily Life

Understanding The Check Engine Light - On all modern vehicles there is a computer that controls the way the engine operates, this computer is called Electronic Control Module, or ECM. The purpose of the ECM is to maintain the engine running within emissions limits and at top efficiency. With the very strict emission regulations of today, this is not an easy task to achieve. Precise and constant adjustments to match various conditions of the engine must be made by the ECM in regards to speed, load, engine temperature and others. How the ECM works: A number of sensors are available that provide the ECM with the information it needs, such inputs are engine and ambient temperature, vehicle speed and load. The ECM makes adjustments by advancing or retarding the ignition timing, adds or subtracts fuel or increases and decreases the idle speed. In the exhaust, before the catalytic converter, an oxygen sensor monitors the quality of the combustion produced in the cylinders. The sensor produce...

The Basics of a Remanufactured Engine - Even if the commercials seen on TV might make you believe that an engine can run forever, that is not really true, any engine wears out eventually. The engine under the bonnet of your car is composed of many moving parts that are projected to work together and harness the internal combustion power under those brutal conditions. When the engine fails, a good idea would be to think about a remanufactured replacement engine. A remanufactured engine can be a way to keep driving your trusty car even after an engine failure. Before making a decision whatever you want a remanufactured engine installed or not you must make sure the rest of the vehicle is in good condition, as well as other systems on the vehicle. If you replace the engine on a car that has a damaged fuel of cooling system then that would be a very time consuming and expensive mistake if not correct. If your vehicle is in good shape, or you have recently made an investment in major compo...