What's wrong with the ignition coil damage?

in the car ignition coil, the role as the voltage transformer, a voltage of 12 volts instantly transformed into a twenty thousand or thirty thousand volt car, need such a large voltage to normal driving operation.        ignition coil out problem, maybe the plastic outer packing of the coil is broken or the copper wire is broken. This is related to the use of driving, some cars are not bad for years, and some cars will be broken in a few years. For car owners, to make the ignition coil used for a long time, one should pay attention to the use of the spark plug, use the aging spark plug will increase the workload of the ignition coil, in addition to pay attention to the car's water temperature, high temperature of the car ignition coil easily burned out. Generally speaking, the ignition coil itself is a transformer, the transformer is in household appliances, when the voltage is within the prescribed scope changes, will not burn the transformer, transformer is usually burned in the transformer load this will cause overweight, so when the solution of the problem we must try to find out the cause of the heavy load the causes of aging or component.        failure phenomenon, ignition coil damage or bad work will lead to fire, causing the engine can not start, idle instability, poor acceleration, exhaust pipe blasting and excessive emissions and other failures.        fault diagnosis and elimination        (1) touch the ignition coil shell induction temperature, feel the heat is normal, if hot as ignition coil, there is turn to turn short circuit fault.        (2) measurement of a winding and two winding resistance value with a multimeter, if the measured resistance is infinite, winding circuit fault; if the resistance is too large or too small, the winding or poor contact points (interturn short circuit at 20 degrees C environment, a winding resistance should be 0.5-1.on, the electronic ignition system, conventional ignition system should be 1.5-3.0n. The resistance value of the two winding should be 2.5-4kn, and the traditional ignition system is 6-8kn. The winding ground connection, with universal meter measuring resistance ignition coil terminals and the ignition coil shell to identify. The resistance is zero, indicating that the winding ground; poor insulation resistance of less than 50Mn.        (3) some faults of ignition coils can not be reflected only by universal measuring resistance method. For example, the ignition coil internal insulation aging or small cracks, these are only under high voltage leakage caused by secondary voltage drop, ignition energy is insufficient and make the engine work abnormal or not work. These faults need to be accurately identified by special instruments.        (4) substitution method, test by contrast jump fire method. This method can be carried out on the test bench or on the car, and the tested ignition coil and the good ignition coil are connected respectively to see whether the spark intensity is the same. Ignition coil testing, such as the internal short circuit, open circuit, ground fault, or fire strength does not meet the requirements, the general should be replaced with new parts. Kiviciu summed up the common fault of ignition coil is a primary winding, two winding circuit, winding interturn short circuit or grounding insulation aging, leakage;; internal connection point of contact wire. These failures will cause the ignition coil: no voltage two times, or two times the voltage is too low and not ignition; can jump, but because the two voltage decreased, ignition energy shortage and high off the fire, no fire, the engine is difficult to start, idle instability, power loss, and exhaust pollution fuel consumption increase.

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