What are the reasons for multi-cylinder misfire in Jetour X70?
2 Answers
Jetour X70 multi-cylinder misfire is caused by poor spark plug contact, excessive self-induced voltage in the fuel injector, and poor heat dissipation of the transistor. Below are detailed explanations for the aforementioned reasons: Poor spark plug contact: If ignition fails at a certain moment, a cylinder misfire will occur. The spark plug needs to be replaced or inspected. Excessive self-induced voltage in the fuel injector: This can cause sticking in the next working cycle, requiring inspection and repair of the fuel injector. Poor heat dissipation of the transistor: Poor heat dissipation of the transistor inside the computer board leads to the ignition coil not working. Insufficient cylinder pressure results in ignition failure, necessitating inspection and repair of the transistor.
I've encountered similar situations before. Multiple cylinder misfires could be caused by aging spark plugs or faulty ignition coils. Excessive carbon buildup on spark plugs or incorrect gaps can lead to ignition failure, resulting in abnormal operation of multiple cylinders. Fuel system issues are also common, such as clogged fuel injectors or insufficient fuel pump pressure, causing an imbalance in the air-fuel mixture. Additionally, blockages in the air intake system, like a dirty throttle body or untimely replacement of the air filter, can affect combustion efficiency. Faulty signals from the throttle position sensor or crankshaft sensor are also common causes, as incorrect sensor signals can lead the ECU to send wrong commands. Long-term lack of maintenance might even cause ECU failures. These problems can lead to engine shaking, reduced power, and a significant increase in fuel consumption, which is especially dangerous at high speeds. It's recommended to use an OBD scanner to diagnose and locate the root cause promptly, replacing faulty parts or cleaning carbon deposits to prevent minor issues from turning into major failures and disrupting your trip. Regular checks of spark plugs and fuel filters can effectively prevent such issues.
