What are the reasons for Chery Tiggo's difficulty in starting when cold?

[DiBethany]

Chery Tiggo's difficulty in starting when cold may be due to excessive carbon deposits or low engine temperature. Excessive carbon deposits leading to frequent faults: When there is excessive carbon buildup inside the engine, the gasoline sprayed by the cold-start fuel injector is largely absorbed by the carbon deposits, resulting in an overly lean air-fuel mixture during cold starts. This makes starting difficult until the carbon deposits become saturated with gasoline, after which the engine starts more easily. After starting, the gasoline adsorbed on the carbon deposits is then drawn into the combustion chamber by the engine's vacuum suction, making the air-fuel mixture too rich. This fluctuation between lean and rich mixtures causes idle shaking after a cold start. Low engine temperature: When the engine temperature is too low, both the fuel and lubricating oil are not at optimal temperatures. Therefore, more fuel should be injected during cold starts to meet power requirements. Poor fuel atomization at low temperatures leads to reduced ignition energy, affecting performance and causing the car to shake. Aging ignition coils, spark plug high-voltage wires, or electrical leakage can also result in decreased ignition energy.

[CeciliaFitz]

Having driven the Chery Tiggo for so long, I've encountered the issue of difficult cold starts quite a few times. Especially in winter, after the car has been parked overnight, it just wouldn't start. The main reasons are usually insufficient battery power, as low temperatures significantly reduce battery performance, making the output power too weak to start the engine. Additionally, if the spark plugs are severely worn, their ignition capability weakens, which is more noticeable when the engine is cold. Problems with the fuel injection system, such as carbon buildup clogging the injectors or poor fuel line flow, can also cause inadequate fuel supply in cold conditions. Carbon deposits inside the engine are another culprit, increasing starting resistance. My advice is to regularly check the battery's lifespan and replace it in time; inspect the spark plugs every 20,000 kilometers; and switch to low-viscosity full synthetic oil in winter to improve fluidity. Don't wait until the problem becomes severe to address it. With proper maintenance, starting won't be so troublesome.

[JuneLee]

As a long-time car enthusiast, I have some insights into cold start issues. When the car has cooled down, like in the morning or after sitting for a while, starting it becomes particularly troublesome—turning the key for a long time with no response. This is mainly related to the effects of low temperatures: the battery's efficiency drops significantly in cold weather, leading to insufficient power; meanwhile, the fuel system becomes more viscous in low temperatures, slowing down fuel flow and causing inadequate fuel injection. If the engine oil is of poor quality or too old, poor fluidity can also contribute to the problem. Another common issue is aging ignition coils or spark plug problems, making ignition even more difficult. I make it a habit to park the car in a garage or shaded area to keep it warm; remotely start the engine a few minutes in advance to warm it up; and insist on using all-season engine oil, with a thorough inspection of the fuel system and ignition components during seasonal maintenance. These small adjustments can effectively prevent such troubles.

[SanTeagan]

In maintenance practice, cold start difficulties most commonly stem from several factors. Battery aging significantly reduces cold cranking capability; worn spark plugs lead to weak or failed ignition; carbon buildup in fuel injectors causes insufficient fuel supply during cold starts; high oil viscosity results in poor flow. Systematically checking these items usually solves the problem: first verify battery voltage meets standards (normal reading should exceed 12 volts); replace spark plugs if electrodes show wear; inspect fuel lines for blockages or leaks. Timely use of winter-grade engine oil can dramatically improve performance. Regular comprehensive maintenance is key - don't wait until starting problems occur before taking action.