What causes idle vibration in a 2006 Crown?
2 Answers
The reasons for idle vibration in a 2006 Crown are as follows: 1. Fuel quality: The use of poor-quality fuel with high water content or excessive impurities can cause abnormal engine operation and vibration. 2. Fuel pump damage: The fuel pump may malfunction due to internal or wiring issues, leading to overheating, poor operation, short circuits, or burnout, resulting in insufficient or interrupted fuel supply. 3. Clogged fuel filter: A clogged fuel filter or one with excessive foreign particles can restrict fuel flow. Additionally, blocked, cracked, rusted, or deformed fuel lines (due to scraping or collisions) can also cause fuel supply issues. 4. Spark plug issues: Abnormal spark plug ignition, aging components, overdue replacement, carbon deposits, or incorrect model selection (such as heat value) can lead to vibration. 5. Abnormal coolant temperature: A faulty coolant temperature sensor (resulting in incorrect ECU data collection) can cause improper fuel injection or ignition timing, affecting acceleration and causing vibration.
My 2006 Crown was idling like a tractor the other day, which really worried me. At 18 years old, the most common issues are engine carbon buildup and aging spark plugs. Last time at the repair shop, they found caked carbon deposits on the intake valves, directly affecting the air-fuel mixture. Replacing them with NGK iridium spark plugs only cost 200 RMB, and they also cleaned the throttle body carbon deposits. Now it idles as smoothly as a new car. For older cars, it's also important to check the engine mounts - when the rubber deteriorates and loses its cushioning effect, it can cause shaking. By the way, running on very low fuel can also cause this by sucking in impurities, so I now always keep at least half a tank of gas.
