Ignition coil primary coil, secondary line solid core. Ignition Coil system, variable high-voltage, low voltage electrical spark plug spark. Common failure of the ignition coil is a coil breakdown. Failure phenomenon: can not produce high-voltage or high voltage, so that the spark plugs fire or fire weak, causing the engine is not working properly.

Ignition coil damage due to two reasons:

(1) the engine does not work, the ignition switch is not a long time off, due to the thermal effect of the current destruction of the ignition coil in the coil insulation.
 
(2) engine overheating, coil insulation paint plastic failure roast.

(3) the spark plug gap is too large, increasing the load of the ignition coil, so that the breakdown of high tension coil, causing a short circuit or open circuit.
           
(4) high-voltage circuit, so that the high-voltage no way through, likely to cause the breakdown of the high tension coil. When the engine difficult to start, the circuit should be checked whether the high voltage line.
           
Check ignition coil failure:
           
Repair methods: the resistance of the multimeter ohm files detection of primary and secondary coils can be judged that the ignition coil is faulty. Specific Ignition Coil resistance value can be found in
           
Manual shut models.
           
(1) the primary coil circuit
           
Primary coil resistance of the the multimeter rxi file detection, when resistance was significantly greater than normal, indicating that the primary coil leads to poor contact or coil circuit phenomenon. Reconnect when the circuit appear in the parts of the external lead or plug (socket), or welding; circuit internally, and generally difficult to repair, should be replaced.

(2) the secondary coil breakdown damage
           
Multimeter r × 1k file detection of the secondary coil resistance, when resistance was significantly less than normal, indicating that the coil short-circuit breakdown. The main reason to cause the secondary coil breakdown secondary coil high voltage insulation dielectric strength to reduce operating voltage is too high. Caused by the secondary coil high-voltage insulation dielectric strength decreased mainly due to damp the secondary coil, secondary coil overheating and insulation material aging. The secondary coil voltage is too high mainly due to the spark plug electrode gap is too large and high-voltage circuit connections loose.
The secondary coil breakdown occurs mostly between online circle. The secondary coil when the partial breakdown, cause the breakdown site temperature increased significantly, so that failure to develop and expand to adjacent areas. Under normal conditions, it is difficult to repair after the breakdown of the secondary coil, and therefore the proper use and maintenance is particularly important.

(3) the surface discharge
           
Surface discharge means the discharge arcing phenomena in the outer surface of the ignition coil. The main reason is caused by surface discharge surface dirt and excessive moisture. Surface discharge often occurs at high pressure leads to screw near the joints at high pressure leads to the screw and high voltage, usually equipped with a jacket. Surface discharge occurs, often in the discharge site to see the burning traces. When the burning is minor, you can clear the burning material and well insulated handle.

Failure to check the Ignition Coil when the visual inspection and the resistance measurements are difficult to make an accurate judgment, should be replaced by the method of comparison tests with a new ignition coil to be checked. Under normal circumstances, the same type of ignition coil is often used interchangeably, but in the installation size may vary.