What are the causes of IGNITION failure?
2 Answers
Ignition warning light comes on due to: 1. Ignition device failure: The ignition device may be malfunctioning, causing poor engine combustion, requiring inspection and repair; 2. Excessive carbon buildup: Spark plugs may have excessive carbon deposits, abnormal sparking, or no sparking, necessitating cleaning or replacement; 3. Voltage instability: The high-voltage meter or high-voltage coil may be faulty, requiring checks on voltage and resistance; 4. Component damage: Related parts may be malfunctioning, leading to poor combustion in engine cylinders, thus triggering the ignition warning light.
With over twenty years of driving experience, I've encountered many ignition failures. The most common issues are aged spark plugs or excessive carbon buildup, which prevent the engine from starting. Another frequent problem is high-voltage wire leakage—those wires tend to crack over time, causing the current to divert and fail to ignite. Battery issues are also common; insufficient voltage or reaching the end of its lifespan can affect startup. If the starter motor's carbon brushes are worn out, you'll hear a clicking sound when turning the key, but the engine won't crank. The ignition coil is another critical component, especially in older cars—when the coil ages, it can't provide sufficient spark energy. Sensor failures can also disrupt the system; if the crankshaft position sensor fails, the ECU won't know when to ignite. I recommend having the mechanic check the spark plugs during every maintenance service—don't wait until you're stranded on the road to regret it. Also, pay attention to the fuel system; clogged fuel injectors or insufficient fuel pump pressure can also cause ignition problems.
