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Chongqing Benhai Electronic Techonlgy Co.,Ltd
Phone£º18121066650
Contact: Mr. Mu.
Website: www.cqbhdz.com
Company Address: No. 27 Lailong Second Street, Fenghuanghu Industrial Park, Yongchuan District, Chongqing.
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Company News |
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| Complete Guide to Symptoms and Repairs of Ignition Coil Malfunctions |
| RELEASE TIME£º2025/9/6 SOURCE£ºChongqing Benhai Electronic Techonlgy Co.,Ltd READING£º59059TIME |
During the operation of the car, the ECU will precisely control the ignition timing based on different driving conditions. And ignition coil failure can lead to obvious symptoms such as difficulty starting the vehicle, weak acceleration, and unstable idle, such as difficulty starting the vehicle, weak acceleration, and unstable idle. Timely diagnosis and repair of ignition coil faults are crucial for ensuring the normal operation of the engine.
The ignition coil will gradually wear out during use, leading to a gradual decline in its performance. As the ignition coil ages, the ignition voltage gradually decreases, which in turn affects the spark intensity emitted by the spark plug. When the ignition ability of the spark plug is insufficient, the vehicle will experience a series of fault symptoms, such as unstable idle, intermittent stalling, and even difficulty igniting. Once these fault symptoms are detected, the car owner should immediately check the ignition coil and replace it in a timely manner according to the situation to ensure the normal operation of the engine.
¡ø Five major fault manifestations
The five major manifestations of ignition coil failure include:
When the voltage is insufficient, the corresponding cylinder will not work properly, causing the vehicle to shake when idling, feel powerless when stepping on the accelerator, and the fault light will light up.
If there is a leakage in the ignition coil, the vehicle may shake when idling, and shaking will inevitably occur when stepping on the accelerator, accompanied by insufficient power.
When stepping on the accelerator to accelerate, if the ignition coil loses power, it will cause weak acceleration.
Unignited fuel mixture will be discharged through the exhaust pipe. In the high-temperature environment of the exhaust pipe, these mixtures may be ignited and burned, leading to blockage and failure of the three-way catalyst, resulting in worsening emissions.
In addition, faults in the ignition coil can also cause increased engine vibration and a noticeable increase in gasoline odor in the exhaust.
02
Diagnosis and repair of ignition coil faults
¡ø Fault diagnosis methods
The damage of the ignition coil is often related to the aging of the insulation layer or the damage of the switching transistor. The increase in spark plug gap will increase the load on the main coil, increase heat generation, and accelerate the aging of the insulation layer. On the contrary, if the spark plug gap is too small, it will cause excessive discharge current in the secondary coil, which will also lead to excessive heating and accelerated aging of the insulation layer. When the ignition coil burns out shortly after replacement, we need to conduct a more comprehensive investigation. Firstly, the vehicle's generator should be checked to ensure that its power generation is within the normal range and to avoid overloading the ignition coil due to excessive power generation. Secondly, it is necessary to check the gap of the spark plug. If the gap is found to be too large, it needs to be adjusted or replaced. At the same time, attention should also be paid to the compression ratio of the cylinder to ensure that it is within the normal range, otherwise it will affect the ignition effect. In addition, the ECU of the vehicle, the voltage of the battery, and the resistance condition of the high-voltage lines are all objects that we need to detect. If any abnormalities are found, they should be dealt with promptly to avoid further damage to the ignition coil.
¡ø Prevention and maintenance measures
To ensure the durability of the ignition coil, a series of preventive measures should be taken in daily use. This includes preventing the ignition coil from getting damp, regularly inspecting and cleaning the circuit connectors to ensure they are securely fastened without short circuits or grounding. In addition, when replacing the ignition coil, it is recommended to replace it as a complete set at once to avoid other ignition coils from malfunctioning in a short period of time, thus ensuring that your driving experience is not affected.
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