What Causes Engine Shaking and Lack of Power After Driving Through Water?

[DeJoanna]

There are many reasons for engine shaking. Issues such as a dirty air filter, broken high-voltage wires, worn-out spark plugs, abnormal water temperature, clogged fuel injectors, carbon deposits, and oil sludge buildup can all potentially cause engine shaking. Here are the causes and solutions for engine shaking: 1. Severe Engine Carbon Buildup: In this situation, the engine may only start easily after the carbon deposits have absorbed enough gasoline to become saturated. Once started, the gasoline adsorbed on the carbon deposits will be drawn into the combustion chamber by the engine's vacuum suction, enriching the air-fuel mixture. This leads to an inconsistent air-fuel mixture, causing idle shaking after a cold start. Additionally, the lower the temperature, the more fuel is required for a cold start, making carbon buildup a significant factor in whether a cold start proceeds smoothly. The solution is to clean the fuel system and check if the idle control valve has carbon buildup, which should be cleaned if present. 2. Ignition System Issues: The solution is to check if the spark plugs have excessive carbon buildup and replace them if necessary.

[LondynFitz]

I've encountered similar situations while driving. After the vehicle goes through water, the engine shakes and loses power, which is usually a common problem caused by water entering the intake system. For example, if the intake port sucks in water, it blocks airflow, leading to incomplete combustion, cylinder misfires, or imbalance, making the engine shake and lose power. Check if the air filter is soaked; if it is, you'll need to replace it. The spark plugs or high-voltage wires might also get wet and short-circuit, causing ignition failure. In more severe cases, water entering the cylinders can cause 'hydrolock,' requiring disassembly to remove the water. I recommend not continuing to drive—find a safe place to park and let the water evaporate, or go directly to a repair shop to inspect the intake system and electronic components to avoid serious engine damage later.

[JanelleLynn]

I've seen many cases where engine shaking and loss of power after driving through water are mostly caused by affected electrical systems. For example, wet spark plugs failing to ignite, leading to individual cylinders not working. Or water seeping into sensors like the oxygen sensor, causing the ECU to misjudge the fuel mixture, resulting in decreased combustion efficiency and insufficient power. It could also be water entering the exhaust pipe, increasing back pressure and restricting exhaust flow. You need to immediately turn off the engine and check for wet spots in the engine bay, using compressed air or a towel to dry the components. If the water was too deep and you didn't notice while wading through, drive slowly to avoid water intake and check the fuse box for potential blown fuses. Early intervention can save you from major repair troubles.

[StNadia]

After driving through water, if the engine shakes and loses power, it's often due to water blockage—like a wet air filter restricting airflow, leading to poor combustion and reduced power. You should immediately pull over, turn off the engine, and check the air filter and spark plugs for moisture. Wet spark plugs can cause misfires and engine shaking, requiring drying or replacement; water-contaminated fuel may also affect the fuel pump's operation. Simple cases can be handled yourself, but if unsure, call a tow truck for professional repair. Experts will use diagnostic tools to check for internal water accumulation or wiring faults.

[BenjaminLee]

I always remind people around me to be cautious when driving through waterlogged areas, as engine flooding often causes shaking and power loss. The reason lies in water interfering with normal combustion. It could be water intake restricting airflow through the air inlet, or water splashing onto electronic ignition components causing intermittent sparks. After crossing water, drive out slowly and promptly check the intake system for moisture. If shaking occurs, avoid forcing a restart to prevent further damage; it's best to visit a professional workshop for comprehensive engine cleaning and testing. Regular maintenance ensures good sealing to prevent such issues.