Ignition coil as an important component of the car ignition system, often ignored by many drivers, resulting in a lot of car problems.
below, let's talk about the ignition coil common failure and causes!
Common ignition coil faults, such as coil winding short circuit, circuit break or tie, will lead to no high voltage generation;
In addition, the ignition coil insulation layer material aging, insulation performance deteriorates, ignition coil leakage, so that the electric spark is weak, ignition energy is not enough, resulting in idle instability, intermittent flamed and can not catch fire.
In the event of such a failure, it is necessary to check whether the resistance and insulation performance of the ignition coil meet the requirements, if not, replace it.
5 manifestations of ignition coil failure
01）When an ignition coil fault voltage is insufficient, the corresponding cylinder will stop working, causing the vehicle idle jitter, weak accelerator, fault light on;
02）If the ignition coil leakage, idle vehicle may occur jitter, and step on the accelerator must occur jitter, and insufficient power;
03）Accelerator acceleration, ignition coil power, resulting in weak acceleration;
04）The fuel mixture that is not ignited will be discharged by the exhaust pipe, and under the action of high temperature of the exhaust pipe, the fuel mixture may be ignited and burned, resulting in the blockage and failure of ternary catalysis, and the deterioration of emission.
05）Ignition coil failure can also cause engine vibration, gasoline fumes in the larger smell.
Repair method for ignition coil failure
The ignition coil burns out mainly because of the aging insulation layer breakdown or damage of the switch triode. The spark plug gap assembly leads to large load of the main coil, large heating and fast aging of the insulation layer.
Small spark plug clearance leads to large discharge current of the secondary coil, large heating and fast aging of the insulation layer.
The assembled ignition coil may have poor insulation durability, high internal resistance and high heating, and the quality of the three tubes will be shorter.
If it is always burnt out, it will be burnt out again soon after replacement. At this time, it is necessary to conduct further investigation on other components to find out the cause:
01）Check the generator. If the generator generates too much electricity, the ignition coil will be overloaded and burned out.
02）Check whether the spark plug gap is too large, if too large need to adjust the gap or replace the spark plug;
03）Check the cylinder compression ratio, if not normal to adjust the compression ratio;
04）Detect whether the vehicle ECU is faulty, and remove the fault or replace the ECU;
05）Test whether the battery voltage is stable;
06）Check whether the resistance of the high-voltage cable is normal. If not, replace the high-voltage cable.
07）Check whether the secondary coil has short circuit phenomenon;
Daily maintenance of ignition coil
The ignition coil is actually a transformer that converts the car's 12-volt voltage to 20-30,000 volts. The car ignition system uses this high voltage to ignite the mixture in the cylinder.
In daily maintenance, attention should be paid to:
Prevent ignition coil from heat or moisture;
Do not turn on the ignition switch when the engine is not running;
Regularly check, clean and tighten the line joints to avoid short circuit or tie-up;
Control engine performance to prevent overvoltage; Spark plug shall not be long "hanging fire";
The moisture on the ignition coil can only be dried with a cloth, never baked with fire, otherwise it will damage the ignition coil.
It is recommended to replace the ignition coil in a complete set to avoid the failure of other ignition coils in a short time, which may cause trouble to the vehicle.
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