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Promotional Parts Catalog:Home > Ignition > Ignition Module
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Volvo Ignition Module Mercedes Ignition Module
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Volvo Ignition Module
Volvo Ignition Control Unit
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Mercedes Ignition Control Unit
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VW Ignition Module
Volkswagen Ignition Control Unit
Ignition - Spark Plug Wires, Ignition Coil, Ignition Coil Pack, Distributor Cap, Spark Plugs, Glow Plug Relay, Distributor Rotor

What is an ignition module? On vehicles with electronic ignition systems, points were replaced with an ignition control module and cam lobes were replaced with a trigger device. The trigger device, also referred to as a magnetic pick up or Hall effect sensor (located inside the ignition distributor) sends a signal  to open and close the ground circuit to the ignition coil to fire the spark plugs. As it current flows thru the trigger unit, the module turns the current back on. It's an a very accurate method of controlling this procedure. Another advantage of the electronic ignition system is that it is able to produce higher voltages, up to twice the voltage than that of prior conventional ignition systems.

On some vehicles the ignition module is located inside the distributor or on the distributor housing, while in other models such as Mercedes, BMW, Saab, Porsche and Volvo, its attached to the inner fender well or chassis of engine compartment.

What are the symptoms of a defective ignition module? If a module is defective, the vehicle is usually completely dead. The engine won't run because there's no trigger voltage to the ignition coil.

What is an ignition coil? The ignition coil acts as a transformer that steps up the voltage from the battery to the spark plugs - the voltage is stepped up from 12 volts to many thousands of volts which are needed for the spark plugs to perform. Ignition coils have two sides, there is the 12v or primary side - this end has a wire coil with has a few hundred loops of a large diameter wire and builds up the magnetic field in the coils. The other end/side is the high voltage or secondary side - this end of the coil has thousands of loops of smaller diameter wire. The coil uses a method called electromagnetic induction to generate a high voltage. When the voltage on the primary side is turned off, the collapsing magnetic field induces a voltage in the secondary side which produces thousands of volts, which as mentioned before, is needed for the spark plugs to function.

Can't find the ignition distributor? Many late model cars on the road now have a computer controlled ignition system where the ignition control module and the trigger device have been replaced with a crank sensor and ignition control unit. Some later vehicles have done away with the ignition distributor totally, as these ignition control units are so sophisticated and accurate that there is no need for an ignition distributor. The sensors detect the position of the crank and in turn control the the current to each separate ignition coil  for each spark plug. The advantage of having a multi coil system, unlike the convention one coil system, is that when one coil would go bad your vehicle, the vehicle would be in-operative, but when say one of six coils is defective, you are still able to drive the vehicle on five coils.

I have a multiple ignition coils - why? Some later vehicles have done away with the ignition distributor totally, as these ignition control units are so sophisticated and accurate that there is no need for an ignition distributor. The sensors detect the position of the crank and in turn control the the current to each separate ignition coil for each spark plug. The advantage of having a multi coil system, unlike the convention one coil system, is that when one coil would go bad your vehicle, the vehicle would be in-operative, but when say one of six coils is defective, you are still able to drive the vehicle on five coils.The disadvantages are that  it is sometimes difficult to tell which one of the coils is defective without the right diagnostic equipment and thus more expensive to replace multiple coils than replacing just one coil.

We also stock other ignition products such as an Ignition Wire Set, Ignition Coil, Ignition Coil Pack, Distributor Cap, Spark Plugs, Glow Plug Relay, Distributor Rotor and more for fine European and Asian automobiles such as Mercedes, BMW, Porsche, Audi, Volkswagen, Saab, Volvo, Honda, Toyota, Mazda, Mitsubishi and more.

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