Why Does a Minivan Shake While Driving?
1 Answers
Here are the reasons why a minivan may shake while driving: 1. Severe engine carbon buildup: The most common cause of vehicle shaking is a dirty throttle body or excessive carbon deposits in 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. Solution: Clean the fuel system and check if the idle control valve has carbon buildup that needs cleaning. 2. Ignition system issues: Inspect the condition of the spark plugs, high-voltage wires, and ignition coils. Poor performance of the ignition system or weak spark plug firing can also cause such symptoms. Solution: Check if the spark plugs have excessive carbon buildup and replace them if necessary. 3. Unstable fuel pressure: Have the fuel supply pressure and intake pressure sensors checked at a 4S shop. Abnormal fuel pump pressure or faulty intake pressure sensor readings can cause the vehicle to shake. Solution: Check the fuel pressure and replace components if needed. 4. Aging engine components: Vehicle shaking can also be related to worn engine mounts. Engine mounts act as the engine's shock absorption system, absorbing minor vibrations during operation. If the engine mounts are faulty, these vibrations can transfer to the steering wheel and cabin, causing shaking at idle.
