The steps and techniques for judging the quality of ignition coil
Judging the quality of the ignition coil can be carried out through a variety of methods, the following are some commonly used detection steps and skills:
Observation appearance : First of all, you can open the engine room and directly observe whether the ignition coil has any abnormal conditions such as glue overflow, burst, connection pipe and high pressure nozzle ablation. Check the insulation cover and housing of the ignition coil for cracks or moisture, which can cause the ignition coil to lose its ability to ignite.
Check working status : After the vehicle runs for a period of time, by holding the ignition coil, you can preliminarily judge whether it works normally. Use the screwdriver to switch the breaker contact, and observe whether there is a blue and white spark skip between the high voltage line and the cylinder block, and accompanied by a crisp sound. If there is a spark and sound, indicating that the ignition coil performance is good; If there is no spark and the high voltage line is normal, the ignition coil may fail.
Measure voltage : Use a multimeter to measure the voltage of the ignition coil after starting the car. If the measured voltage is about 5V, the ignition coil is working properly. If the measured voltage is less than 5V, it may mean that the ignition coil is faulty.
check temperature : when the engine is running, the temperature of the ignition coil can also be used as the basis for judging its quality. A slightly hot state is ideal, while overheating may indicate a poor or damaged ignition coil.
professional diagnosis : through the professional computer diagnostic instrument to detect the ignition coil. If the ignition coil fails, the diagnostic instrument will display an indication of indirect fire or lack of fire in the engine cylinder. Once this happens, the ignition coil needs to be replaced in time.
Unplug test : After starting the engine, unplug each ignition coil one by one. If after unplugging a plug, the car jitter intensifies, indicating that the ignition coil is good; If the jitter does not change after unplugging, the ignition coil may be damaged.
fire jump test : Remove the spark plug from the engine and install it on the ignition coil for fire jump test. See which spark plug does not jump fire, it means that the ignition coil is damaged.
Through the above method, the performance of the ignition coil and whether there is a fault can be effectively judged. If the ignition coil is found to be damaged, it should be replaced in time to ensure the normal operation of the vehicle.
Observation appearance : First of all, you can open the engine room and directly observe whether the ignition coil has any abnormal conditions such as glue overflow, burst, connection pipe and high pressure nozzle ablation. Check the insulation cover and housing of the ignition coil for cracks or moisture, which can cause the ignition coil to lose its ability to ignite.
Check working status : After the vehicle runs for a period of time, by holding the ignition coil, you can preliminarily judge whether it works normally. Use the screwdriver to switch the breaker contact, and observe whether there is a blue and white spark skip between the high voltage line and the cylinder block, and accompanied by a crisp sound. If there is a spark and sound, indicating that the ignition coil performance is good; If there is no spark and the high voltage line is normal, the ignition coil may fail.
Measure voltage : Use a multimeter to measure the voltage of the ignition coil after starting the car. If the measured voltage is about 5V, the ignition coil is working properly. If the measured voltage is less than 5V, it may mean that the ignition coil is faulty.
check temperature : when the engine is running, the temperature of the ignition coil can also be used as the basis for judging its quality. A slightly hot state is ideal, while overheating may indicate a poor or damaged ignition coil.
professional diagnosis : through the professional computer diagnostic instrument to detect the ignition coil. If the ignition coil fails, the diagnostic instrument will display an indication of indirect fire or lack of fire in the engine cylinder. Once this happens, the ignition coil needs to be replaced in time.
Unplug test : After starting the engine, unplug each ignition coil one by one. If after unplugging a plug, the car jitter intensifies, indicating that the ignition coil is good; If the jitter does not change after unplugging, the ignition coil may be damaged.
fire jump test : Remove the spark plug from the engine and install it on the ignition coil for fire jump test. See which spark plug does not jump fire, it means that the ignition coil is damaged.
Through the above method, the performance of the ignition coil and whether there is a fault can be effectively judged. If the ignition coil is found to be damaged, it should be replaced in time to ensure the normal operation of the vehicle.
