What are the reasons for the ignition coil of the Baojun 730 not firing?
2 Answers
The reasons why the ignition coil of the Baojun 730 may not fire include: 1. Weak battery: The starter begins to turn but lacks sufficient power, eventually making only a clicking sound without turning. Low temperatures in winter or forgetting to turn off certain electrical devices can prevent the vehicle from starting, especially after prolonged short-distance, low-speed use in winter, which can cause the battery voltage to drop below the rated value, making it impossible to start or operate normally. If this occurs, please call the service station for assistance, jump-start the vehicle, or temporarily start it, then ensure the battery is fully recharged at the service station. 2. Fuel flow obstruction: No oil pressure in the engine fuel supply line. This situation often occurs on particularly cold mornings due to long-term dirt buildup in the fuel lines. Extremely low temperatures can cause water and debris to mix, blocking the fuel lines and preventing the engine from starting. Placing the vehicle in a warm environment can help it start after a while, or thoroughly cleaning the fuel system can resolve the issue. 3. Poor ignition system performance: On very cold days, low intake temperatures can cause poor fuel atomization in the cylinders. Combined with insufficient ignition energy, this can lead to cylinder flooding, where excessive fuel accumulates in the cylinders, exceeding the ignition limit concentration and preventing the engine from starting. Removing the spark plugs to clean the oil deposits between the electrodes and reinstalling them may allow the engine to start. A more thorough solution involves inspecting the ignition system to address low ignition energy, such as checking the spark plug electrode gap, ignition coil energy, and the condition of the high-voltage wires.
I just repaired several ignition coil failures on the Baojun 730, mainly caused by coil aging or damage. After prolonged use, the internal windings may break, resulting in the inability to generate sparks to ignite the fuel. Loose or oxidized connectors in the wiring are also an issue, especially on rainy days when moisture can cause rust at the connections. Then check if the fuse is blown—excessive current can burn it out, so you need to look at the corresponding markings in the fuse box. ECU faults can also disrupt the signals. I think the solution is to first unplug the connector to check for cleanliness or test with a new coil. Regular maintenance can help prevent this issue. If the coil is faulty, repair it promptly to avoid breaking down on the road. This problem often occurs in older vehicles, where vibrations can easily cause issues.
