My Autos

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.
Source: www.ArticlePros.com

Your Mechanic Can Be a Valuable Asset When Purchasing A Used Car
Car dealers are not particularly well liked, and knowing as many of them as I do, I can understand why that might be the case. I run an import shop in Florida that specializes in late model luxury imports. I’ve been in business for quite some time, and I have heard plenty of horror stories from customers regarding other dealerships. In my opinion, I think the majority of car dealerships one will encounter are reputable, by and large. I say “by and large” because some dealers I know use nickel and dime methods to maximize their profits, which I disagree with. Personally, I would rather give the customer a quality auto at a fair price and consequently gain a lifetime customer, but that’s a topic for another article. One of the more recent horror stories I heard involved someone who had purchased a vehicle that was leaking oil. For those of you that know anything about cars, you know that this is nothing to be taken lightly. The customer was assured by the dealership that this older, yet low mileage used car was in pristine condition. Here’s where it gets interesting… Before the sale, the customer asked if she could have the car inspected by her mechanic. The dealership did everything they possibly could to keep that from happening, and succeeded. They told her that they would have their own mechanics do a “twenty point inspection” which would save her the time and expense of having her mechanic take a look. Unbelievable! Since the customer parked her car on a busy street where there were already several oil spots, she never noticed the leaking until after her ridiculously short thirty day warranty was up. Her mechanic would have spotted an oil leak the minute he had the car up on the rack. As disheartening as this story is, there is a valuable lesson to be learned here. Car buyers, unless they are dealing with a dealer they are familiar with and whom they trust, should seriously consider having a mechanic check out any used car they are interested in (preferrably the local certified manufacturer dealer of the automobile make they are considering). I have had several first time customers ask me if they can have the car independently inspected and I am always happy to oblige. Take my word for it, the only dealers who would frown upon independent inspections are those who have something to hide. To learn more visit Spanos Imports of Daytona Florida visit http://www.spanosimports.com/
Source: www.ArticlePros.com