Why does the Honda CR-V engine shake when warm?
2 Answers
Honda CR-V engine shaking when warm is caused by ignition system issues and unstable oil pressure. Below are the reasons and solutions for Honda CR-V engine shaking. Severe engine carbon buildup: The most common cause of car shaking is a dirty throttle body or excessive carbon deposits on the fuel injectors. When there is too much carbon buildup inside the engine, the gasoline sprayed by the cold start injector is largely absorbed by the carbon deposits, resulting in an overly lean air-fuel mixture during cold starts and making it difficult to start. In this situation, the engine will only start easily once the carbon deposits have absorbed enough gasoline to become saturated. After starting, the gasoline adsorbed on the carbon deposits is then drawn into the combustion chamber by the engine's vacuum suction, making the air-fuel mixture too rich. This fluctuation between lean and rich mixtures causes idle shaking after a cold start. Aging engine components: Car shaking can also be related to worn engine mounts. Engine mounts act as the engine's shock absorption system, responsible for absorbing minor vibrations during operation. If the engine mounts are faulty, these vibrations will transfer to the steering wheel and the cabin, causing shaking at idle.
I've been driving a Honda CR-V for several years and have encountered engine shaking during warm-up a few times. Common causes may include aging spark plugs with electrical leakage, which work fine during cold starts but develop larger gaps when hot, leading to unstable ignition. Excessive carbon buildup in the throttle body can also affect air intake, causing more turbulent airflow at high temperatures. Aging engine mount rubber components may loosen during temperature changes, exacerbating vibrations. Remember to check if the engine oil level is normal, as low oil can affect lubrication and worsen shaking. Abnormal operation or failure of the cooling fan can cause engine overheating. For daily maintenance, it's recommended to clean the throttle body and replace spark plugs regularly, and inspect the mount condition every 20,000-30,000 kilometers. If the problem is severe, visit a professional repair shop promptly for diagnosis. Don't underestimate this issue, as it may lead to reduced power, increased fuel consumption, and affect driving smoothness.
