What causes engine shaking during cold start in Changan vehicles?

[LaAmy]

Changan vehicles may experience engine shaking during cold starts due to the following reasons: 1. Damaged spark plugs: Worn electrode gaps result in insufficient spark energy, leading to incomplete combustion of the air-fuel mixture; 2. Cracked ceramic insulators on spark plugs: Failure to spark in one cylinder will cause noticeable engine vibration; 3. Poor fuel quality: Improper atomization by fuel injectors leads to incomplete combustion in cylinders. The Changan CS55 is an SUV model from Changan Automobile, with body dimensions of 4500mm (length) × 1855mm (width) × 1690mm (height) and a wheelbase of 2650mm. Powering this vehicle is a 1.5T turbocharged all-aluminum engine with model designation JL476ZQCD.

[Jaxon]

I've been driving a Changan car for several years and have encountered engine shaking during cold starts a few times. I remember last winter, my CS75 would shake violently every morning when starting. After taking it to the repair shop, they found the spark plugs were worn out and replaced them. Faulty spark plugs can affect ignition efficiency, leading to incomplete combustion and causing the car to shake. Additionally, excessive carbon buildup can also cause trouble, as Changan cars tend to accumulate carbon deposits that clog the fuel injectors over time. I recommend regularly changing the engine oil, cleaning the air filter, and using good-quality fuel additives. Insufficient lubrication during cold starts can also worsen engine shaking, especially in low winter temperatures. Warming up the car for a few minutes beforehand can help alleviate the issue, but if it's severe, it's best to seek professional help immediately to avoid damaging other engine components. With proper maintenance, the car will run much more smoothly.

[Jackie]

I'm a young driver with a Changan UNI-V, and my new car started shaking violently during cold starts just three months after purchase, which is really frustrating. The 4S dealership diagnosed it as a faulty ignition coil causing intermittent misfiring in the spark plugs. Modern Changan models come with electronic control systems, and issues with the ECU or crankshaft position sensor could also lead to unstable shaking. I make sure to regularly check the battery voltage, as low voltage can affect startup. I also keep the vehicle's software updated to prevent bugs. During cold starts, low temperatures increase oil viscosity, reducing lubrication and exacerbating vibrations. Using the right oil viscosity and warming up the car before driving has helped a lot. Some Changan engine models are prone to carbon buildup, so preventive measures are necessary. Ignoring small issues can lead to a chain reaction of major faults.

[Dora]

I enjoy tinkering with car mechanics, and cold start shaking is common in Changan vehicles. Engine cylinder imbalance may stem from incorrect ignition timing, wide spark plug gaps, or improper air-fuel ratio. Checking spark plug condition is straightforward—replace them if necessary. Carbon buildup can also clog fuel lines, causing abnormal combustion. The SAE grade of engine oil plays a crucial role in cold-start lubrication. Some older Changan cars experience shaking due to sensor misalignment. The principle of thermal expansion and contraction causes poor component fit when cold, leading to natural vibrations. Timely maintenance is key to preventing minor issues from worsening.