Igniting a Spark
Your Volvo has thousands of parts in it. Some play a crucial role in the car, while others do not. Some are used all the time, while some are needed only for a specific time. One of the latter is your Volvo’s ignition coil. Also called a spark coil, the ignition coil is an induction coil in the automobile’s ignition system. The Volvo ignition coil transforms a storage battery’s 12 volts into the thousands (which sometimes could reach as high as 120,000 volts) needed to ignite the spark plugs. Invented by A. Kent Atwater in 1921, the ignition coil is a simple transformer that has two sides: the 12 volt or primary side and the high voltage or secondary side. The primary side contains a few hundred turns of a large diameter wire and it builds up the magnetic field in the coils. On the other hand, the high voltage side contains thousands of turns of small diameter wire. The coil uses electromagnetic induction to create the high voltage. When the voltage in the primary side is turned off, the collapsing magnetic field in the secondary side induces a voltage in the secondary side, producing thousands of volts. In older vehicles, a single, large ignition coil would serve all the spark plugs, distributing voltage via an ignition distributor. In modern systems, the distributor is omitted and ignition is controlled electronically, instead. Much smaller coils are used with one coil for each spark plug or one coil serving two spark plugs (so two coils in a four-cylinder car). These coils may be remote-mounted or they may be placed on top of the spark plug (coil-on-plug or direct injection). Where one coil serves two spark plugs (in two cylinders), it is through the “wasted spark” system. In this arrangement, the coil generates two sparks per cycle to both the cylinders. The fuel in the cylinder that is nearing the end of its compression stroke is ignited, whereas, the spark in its companion nearing the end of its exhaust stroke has no effect. The wasted spark system is more reliable than a single coil system with a distributor and cheaper than coil-on-plug. Where the coils are remote mounted, they may all be contained in a single molded block with multiple high-tension terminals. This is commonly called a coil-pack. Your Volvo ignition coils are part of a larger system, which is the ignition system. The ignition system is part of an even larger engine system. The ignition system’s primary responsibility is the timely burning of the fuel-air mixture in the engine. Your Volvo user’s manual would carry the recommended service interval for your ignition system, including your Volvo ignition coil. Your Volvo engine might run rough, buck, surge, stall or even get poor fuel economy. These are signs that your ignition system might need servicing as they are potentially an ignition system problem. When this happens, drive to the nearest Volvo dealership and have a qualified technician take a look around. Your Volvo engine might be in problem in the long run. John Garrett is an automobile mechanic who knows every crook and cranny of his truck. He's also a vintage car enthusiast , and he's dedicated to fixing and restoring them. He is a motorist who believes in continuous research and improvement.
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Review of 2008 car models of Pontiac
Pontiac: leading the way of the sports cars: - Since the craze of the small sporty cars is again rising in the market, Pontiac had launched the Pontiac G5 which is proving to be the most reasonable car for small and sporty people. The main thing about the new models of the Pontiac is that they are coming with many impressive features like of high acceleration, increased performance of riding and also the economy of fuel. Only thing is that these models are lacking the refinements in the exterior and interior but this can be easily compensated with the boastful and powerful engines present in the new models of Pontiac. The latest models of Pontiac which were launched in the year 2008 were patterned after the upcoming of the Chevrolet Cobalt. Both companies had manufactured exactly the same model cars with a little difference in the exterior and interiors designs. It can be said that car models of Pontiac are very much sporty and has much powerful engine and that too is available at much affordable price. Besides this, these models have got the brand name of the General Motors. Features of the Pontiac car models: - The new models of Pontiac are available in 2 trims which is base and the other is GT. The base model includes the 15″ steel wheels, remote keyless entry, full power accessories and air conditioning. Besides this, there is also the facility of the folding rear seats of type 60/40-split, an auxiliary audio jack attached with a CD/MP3 player and a satellite radio. The models of Pontiac which are available in GT trim has got the 17″ aluminum wheels which provides the sport-tuned suspension, cruise controls, steering-wheel-mounted audio and a leather-wrapped shifter and steering wheel. When it comes to the talk of entertainment in the Pontiac models then they are fully furnished with the Pioneer 7-speaker audio system, 6-CD changer, remote vehicle starting, a sunroof and heated front seats which are available in both the models. Besides this the personalization of the models of Pontiac can also be done by the installment of the additional accessories like the 18″ wheels, body ground-effects package, high-mount spoiler, cat-back exhaust system and interior lightning of custom colored. Describing the engine of the Pontiac models: - The car models which are base type are powered by the 2.2 liter inline 4-cylinder which can generate 148 hp and also the torque of 152 pound-feet. While the vehicles which are bases on GT have got the 2.4 liter engine which can generates 141 hp with a torque of 167 lb-ft. Both of the trims care connected with the 5-speed manual transmission. There is also an option of 4-speed transmission which is automatic.Know more about <a href=" http://www.gotengines.com">Used Engines </a> cheap<a href="http://www.gottransmissions.com"> Transmission Replacements </a> do visit GotEngines.com and GotTransmissions.com.
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