What causes the 40-shake to exceed the non-shake?
2 Answers
40-shake exceeding non-shake is caused by carbon deposits in the engine throttle intake pipe combustion chamber, ignition system malfunctions, and other reasons. Specific causes: Carbon deposits in the engine throttle intake pipe combustion chamber, forgetting to release the handbrake, insufficient engine oil, poor oil supply, low-quality engine oil, excessive spark plug gap, insufficient tire pressure causing imbalance, and aging engine components leading to shaking. Solutions: Severe engine carbon deposits—clean the fuel system; check if the idle motor has carbon deposits and clean it thoroughly; ignition system malfunction—check if the spark plugs have excessive carbon deposits and replace them if necessary; unstable oil pressure—inspect the oil pressure and replace components if needed; check engine components and replace any damaged parts.
That day when I was driving my car, as soon as the speed went over 40 km/h, the steering wheel started shaking like a sieve, which really freaked me out, so I quickly pulled over. Later, I drove to a repair shop recommended by a friend, and the mechanic checked it and said it was a tire balance issue—the four wheels were spinning unevenly, wobbling like a washing machine during the spin cycle. He also mentioned checking the suspension system, as loose springs or shock absorbers could cause the car to sway. If it got worse, it might be due to worn wheel bearings or a bent drive shaft, especially common in older cars. If left unrepaired for too long, not only would driving be uncomfortable, but even braking could be affected, increasing the risk of accidents. So I immediately got a four-wheel alignment and replaced the tires. Now it drives much steadier, and I make sure to clean the mud off the wheels during car washes to avoid imbalance.
