What is the problem when the engine shakes and emits smoke?
2 Answers
Reasons for engine shaking and emitting smoke: 1. White smoke: If it is under low-temperature conditions, it is normal for the engine to emit a small amount of white smoke. However, if there is a large amount of white smoke, it may be due to water leakage in the engine cylinder and water passages, causing coolant to enter the engine. Under high temperatures, the coolant evaporates into steam. In this case, it is recommended to visit a professional repair shop or 4S store for inspection and repair. 2. Black smoke: This is caused by incomplete fuel combustion, a dirty air filter, or faulty spark plugs. 3. Blue smoke: This may be due to delayed maintenance, the use of substandard engine oil, or prolonged failure to change the engine oil. It could also be caused by wear and tear on the engine compartment's ducts and throttle body, leading to excessive engine oil being burned during the intake process.
I've been driving for nearly twenty years, and engine shaking with smoke is really a headache. Once, I noticed severe vibrations and blue smoke coming from my old car—turned out the piston rings were worn, letting oil leak into the cylinders and burn, with the blue smoke being the telltale sign. Shaking usually happens due to a misfire in one of the cylinders, possibly from dirty spark plugs or a faulty ignition coil causing poor ignition; black smoke indicates a fuel supply issue, like clogged injectors spraying too much fuel; white smoke warns of engine overheating or coolant leakage, which is a precursor to a blown head gasket. I recommend checking the dashboard for warning lights and reading the diagnostic trouble codes promptly. Regular oil changes and air filter replacements can reduce carbon buildup, preventing misfires and shaking. Safety first—if you notice shaking and smoke, stop the car immediately, turn off the engine, and let it cool down. Don’t push it and risk further engine damage, costing you more in repairs.
