What Causes Engine Shaking the Day After Driving Through Water?

[LeGenesis]

Engine shaking after driving through water occurs because a small amount of water enters the high-voltage wires and the engine air filter element when the vehicle is submerged. Reasons for vehicle shaking after water immersion: Engine shaking after driving through water happens because minor water ingress into the high-voltage wires and air filter element increases intake resistance and allows water to enter the combustion chamber. This leads to poor ignition system performance, and in severe cases, spark plugs may fail to ignite, potentially causing the engine to stall. Additionally, engine shaking could result from driving through excessively deep water, where submerged exhaust outlets affect proper exhaust flow. Proper procedure when driving through water: When approaching water, downshift to 1st or 2nd gear in advance and maintain full throttle to power through. If water submerges the exhaust pipe causing significant power loss (where acceleration becomes ineffective), maintain full throttle without shifting gears mid-crossing. After crossing, stop in neutral gear. Rev the engine several times to expel water from the exhaust system. Before resuming driving, pump the brakes several times and only continue when braking functions normally.