Why does the Volkswagen Magotan stall?
2 Answers
The reasons for the Magotan stalling are as follows: 1. Low temperature: The temperature inside the engine is insufficient, and the temperatures of both fuel and lubricating oil are not adequate. Therefore, during cold starts, more fuel should be injected to meet the power requirements. The larger the spark plug gap, the smaller the ignition energy. At low temperatures, fuel atomization is poor, requiring higher ignition energy. Over time, the ignition gap of the spark plug tends to widen, leading to reduced ignition energy, which affects the vehicle's power performance and causes shaking. 2. Incorrect air-fuel mixture ratio: Inaccurate adjustment of the air-fuel mixture ratio occurs in both open-loop and closed-loop control systems. In vehicles with closed-loop control, the oxygen sensor's minimum operating temperature is 370 degrees Celsius. If the vehicle has just been started, the exhaust pipe temperature may not reach 370 degrees, causing the oxygen sensor to remain inactive. In this scenario, the ECU makes incorrect judgments, leading to errors in controlling the air-fuel mixture and ignition timing through actuators. This reduces the vehicle's power output and results in shaking. 3. Faulty coolant temperature sensor: The coolant temperature sensor is one of the critical inputs for the ECU to determine the engine's operating conditions. If the engine's cold start temperature is -10 degrees Celsius, but the ECU assumes it's 20 degrees, it will inject less fuel than necessary, naturally causing the engine to shake.
I've experienced several engine stalls while driving my Volkswagen Magotan, which is really frustrating. Once, it suddenly stopped at a red light, and after inspection, it was found to be caused by insufficient fuel supply due to a clogged fuel filter. Common causes also include ignition system issues, such as aging spark plugs causing poor ignition or damaged ignition coils leading to power loss. Sensors can also be problematic; for instance, a faulty crankshaft position sensor can cause the ECU to misjudge and shut down the engine. Loose battery terminals or alternator issues causing voltage fluctuations can also lead to engine stalling. It's recommended to use high-quality fuel to avoid impurity buildup and carbon deposits, and to perform regular maintenance, replacing the filter every 20,000 kilometers. During daily driving, avoid slamming the accelerator, and if a stall occurs, stay calm, pull over slowly, and restart the engine.
