What Causes the Misfire Fault in the Envision?
2 Answers
Misfire faults in the Envision can be divided into two scenarios: complete misfire, where there is no combustion at all, and partial misfire, where combustion is unstable. It is advisable to promptly visit a repair shop for maintenance. Causes of engine misfire: Issues with spark plugs, such as clogging or damage. Problems with cylinder wires. Faulty ignition coils. Problems with fuel injectors, including clogging or low voltage causing DME internal injector data loss. Issues with the air-fuel mixture. Problems with cylinder pressure. Solutions for engine cylinder misfire: Measure engine cylinder pressure using a cylinder pressure gauge for easy detection. Changes in valve spring stiffness and camshaft wear are difficult to detect during cylinder pressure measurement. Also, consider whether the intake air volume is sufficient (air leakage or carbon buildup on valves).
I've been driving my Envision for several years and encountered a misfire issue once. At that time, I felt the engine shaking violently, and the diagnosis showed that the spark plugs were heavily carbon-fouled, or the ignition coils might have burned out. Simply put, a misfire means the cylinder fails to ignite, and there can be many reasons, such as poor fuel quality clogging the fuel injectors, aging high-voltage wires leaking electricity, a dirty air filter affecting air intake, or even an ECU sensor error. That time on the highway, the shaking made me panic, so I quickly pulled into a service area for a check. Replacing the spark plugs fixed the problem. I recommend everyone not to slack on regular maintenance: use better-quality fuel, replace spark plugs every 20,000 to 30,000 miles, and don’t wait until a major failure occurs, which can be costly and dangerous. Regularly scan for error codes with an OBD scanner to detect issues early.
