What are the reasons for the difficult cold start of Chery QQ308?

[OMason]

The reasons for the difficult cold start of Chery QQ308 are: 1. Low gasoline pressure and poor atomization; 2. Excessive spark plug electrode gap; 3. Decreased ignition energy of the ignition coil; 4. Short circuit or open circuit in the cylinder wires; 5. Excessive carbon deposits inside the engine; 6. Poor valve sealing. Taking the 2012 Chery QQ308 as an example, it belongs to the microcar category, with body dimensions of: length 3550mm, width 1495mm, height 1485mm, a wheelbase of 2340mm, a fuel tank capacity of 35 liters, and a curb weight of 890kg. The 2012 Chery QQ308 features a MacPherson strut front suspension and a longitudinal trailing arm non-independent rear suspension. It is equipped with a 0.8L naturally aspirated engine, producing a maximum horsepower of 58PS, a maximum power of 43kW, and a maximum torque of 78Nm, paired with a 5-speed manual transmission.

[DeZoey]

I've driven a Chery QQ308 for over a decade, and cold start difficulties are quite common. Usually, an aging battery is the main culprit – its output drops in low temperatures, resulting in weak ignition. The fuel pump also tends to struggle in cold weather, leading to poor fuel delivery. Spark plug carbon buildup or ignition coil issues are other common causes. One winter, my car wouldn't start until I replaced the spark plugs, which fixed the problem. I recommend regularly checking the battery and spark plugs, and warming up the engine a few times before parking in winter to avoid last-minute troubles. Neglecting this could accelerate engine wear and increase fuel consumption.

[VonLily]

When repairing cars, I often encounter issues with the Chery QQ308 having difficulty starting in cold conditions, mostly due to ignition system failures or fuel system problems. Worn-out spark plugs or leakage in the ignition module can cause weak sparks; clogged fuel pumps or injectors lead to low fuel pressure when cold; a faulty coolant temperature sensor can also cause the ECU to adjust the air-fuel ratio incorrectly. It's best to use a diagnostic tool to check the fault codes for accurate identification, rather than attempting DIY fixes that might damage the car. It's recommended to replace worn parts promptly and check the battery voltage before starting in cold weather to ensure it meets the required standards.

[DallasRose]

My Chery QQ308 has been struggling to start when cold recently, possibly due to insufficient battery power, reduced output in cold weather making it hard to crank; the engine oil being too thick causing poor lubrication and engine stiffness; or clogged fuel injectors leading to inadequate fuel supply. For simple solutions, you can test the battery voltage—if it's below 12V, it's time for a replacement, or switch to a better quality oil for winter use. Try preheating a few times before driving to avoid the bigger hassle of breaking down midway.

[DeIsabella]

When playing with old cars, it's often found that the Chery QQ308 has difficulty starting in cold conditions, usually due to sensor or intake/exhaust issues. A faulty coolant temperature sensor may report incorrect temperatures, causing the ECU to supply insufficient fuel; a dirty air filter can lead to inadequate oxygen intake and severe carbon buildup; a short battery lifespan makes it prone to losing charge in low temperatures. It's recommended to clean the throttle body, replace the air filter, check the ECU for error codes to improve the situation, and try using starting fluid in winter.

[LaClaire]

Experienced drivers are well aware that the old Chery QQ308 often has difficulty starting cold, mostly due to insufficient fuel pressure or aging electrical circuits. A worn fuel pump leads to low fuel pressure when cold, spark plug carbon buildup causes poor ignition, corroded wiring connections result in unstable current, and low-temperature compression issues such as cylinder gasket leaks. Years ago, my car had the same problem, which was resolved by replacing the battery and high-voltage wires. Regular maintenance of the electrical circuit and keeping it clean can prevent carbon buildup from worsening fuel consumption and waste.