What to Do When the 2006 Grandis Engine Shakes Severely?
2 Answers
When there is excessive carbon buildup in the engine, the gasoline sprayed by the cold start injector can be largely absorbed by the carbon deposits, resulting in an overly lean air-fuel mixture during cold starts and making it difficult to start. Check the working condition of the spark plugs, high-voltage wires, and ignition coils. Poor performance of the ignition system or weak sparking from the spark plugs can also cause such symptoms. If you have already cleaned the engine carbon deposits, cleaned the throttle body, replaced the oil pads and spark plugs, but still notice the car shaking at idle, it is recommended to have it checked at a 4S shop. If the fuel pump's fuel supply pressure is abnormal or the intake pressure sensor's readings are incorrect or malfunctioning, it can also cause the car to shake.
When driving my 2006 Grandis, I encountered similar shaking issues, which are usually caused by ignition system or fuel system failures. Common causes include aged spark plugs, damaged ignition coils, or a clogged air filter. Recommended inspection steps: First, remove the spark plugs to check if the electrodes are worn or have carbon buildup, and replace them if necessary. Then, check if the fuel pump and injectors are functioning properly; unusual noises may indicate pump issues. Additionally, inspect whether the engine mounts are loose or damaged, as this can also cause shaking. Lastly, a dirty air filter can affect air intake; cleaning or replacing it can help. Don’t overlook potential ECU control module failures, which can be detected with professional diagnostic tools. Addressing these issues early can prevent more severe engine damage. Like me, regular maintenance has reduced such problems significantly. Developing a habit of checking every 5,000 kilometers can extend your vehicle’s lifespan.
