Why does the Boyue shake when starting cold?
3 Answers
The reasons for the Boyue shaking when starting cold include low temperature, inaccurate air-fuel mixture ratio, severe carbon deposits, and ignition coil failure. Taking the inaccurate air-fuel mixture ratio as an example: it exists in both open-loop and closed-loop control. If the car's computer makes a judgment error, its control over the air-fuel mixture and ignition timing through the actuators will be inaccurate, thereby reducing the car's power output and causing shaking. The Boyue is a model under Geely Auto, with body dimensions of 4519mm in length, 1831mm in width, and 1694mm in height, and a wheelbase of 2670mm. In terms of appearance, the Boyue's front face design follows Geely's family-style "water ripple" grille. Considering the sense of power of an SUV, the designer reduced the number of grids, making the overall look more concise and the edges more distinct.
I've also experienced shaking during cold starts with my Boyue, which is quite annoying. The most common causes include aging spark plugs or carbon buildup leading to poor ignition, resulting in unstable engine performance. Clogged fuel injectors can also cause poor fuel atomization during cold starts, affecting combustion efficiency. Severe engine carbon deposits are another culprit, especially in low winter temperatures. Additionally, a dirty throttle body can restrict air intake, making the startup process more jerky. Using old or improperly viscous engine oil that provides poor lubrication can worsen the shaking. Faulty sensors like oxygen sensors may also report incorrect data, misleading engine control. I recommend regular spark plug replacement, cleaning fuel injectors and throttle body every 20,000 km, using high-quality fuel additives to reduce carbon buildup, and timely oil changes for prevention. If the shaking is severe, visit a professional repair shop immediately to avoid affecting engine lifespan and driving safety. From my experience, maintaining good car care habits can save significant repair costs.
I've studied quite a few cases of the Boyue's cold start shaking, and there are many possible causes. The ignition system is the primary suspect: spark plugs may have reached the end of their lifespan or have thick carbon deposits, leading to inconsistent ignition; aging ignition coils could also cause unstable voltage. Fuel system issues shouldn't be overlooked either: clogged fuel injectors may result in inaccurate fuel injection during cold starts, or the use of low-quality gasoline can lead to gum deposits that cause blockages. Carbon buildup in the intake tract can restrict airflow and affect combustion balance. Severe engine carbon deposits, especially under low temperatures, can also lead to incomplete combustion. Sensor failures, such as the crankshaft position sensor, are common and can cause the ECU to misjudge engine speed. Simple troubleshooting steps: first try replacing the spark plugs; if the shaking persists, clean the throttle body and fuel injectors; check if the engine oil is fresh and at the proper level. Developing regular maintenance habits can help prevent these issues. I've noticed that if this problem isn't addressed, it can accelerate engine wear and even increase fuel consumption, so timely intervention is crucial.