Genuine Volvo V70 Ignition Coil

Volvo V70 Ignition Coil provides the shock that allows all the cylinders to fire by increasing the ordinary voltage of a 12-volt battery to the tens of thousands of volts required to produce a spark. Each Ignition Coil has two insulated copper windings known as the primary and secondary windings that wrap an iron core in a hard epoxy case, and when the battery current in the primary is abruptly stopped, the collapsing magnetic field causes 15,000 to 40,000 volts to travel the spark-plug gap and ignite the fuel-air mixture. The first versions of Volvo applied only one coil which fed the distributor, i.e. one tower of high-tension current was taken down to each cylinder via long plug wires. Subsequent versions of the same model applied a waste spark coil pack; two cylinders would share one coil, where one spark would be applied whilst the other was wasted on an exhaust stroke. More recent V70 models transitioned to coil-on-plug or coil-near-plug designs, with each cylinder having its own small coil and no large leads to lose time much more rapidly and reduce losses. In these styles the principle remains the same, but the reduction of voltage drop by packaging increases idle smoothness and reduces emissions. Insulation is cracked by age, excessive heat, or wide plug gaps, or is corroded by high resistance, and a defective Volvo coil is indicated by the appearance of rough running, low mileage, or a red light on the dashboard. It can also cause an engine code and unequal power to be received by a fatigued Ignition Coil; hence performing routine electrical checks will ensure the Volvo power plants remain active.

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