Why does the new Sagitar shake during cold start?

[McCaleb]

Sagitar shaking during cold start may be caused by excessive carbon deposits in the engine. Here are detailed explanations about Sagitar's shaking issue: 1. Cause of shaking: Carbon deposits on valves and intake ports can lead to incorrect judgments by the ECU, resulting in insufficient fuel injection. Even with fully combusted air-fuel mixture, it cannot guarantee adequate power output, thus causing vehicle shaking. 2. Technical principle: During low temperatures, the temperatures of the engine, fuel, and lubricant are all insufficient. Therefore, more fuel should be injected during cold starts to meet power requirements. The larger the spark plug gap, the smaller the ignition energy. Poor fuel atomization at low temperatures requires higher ignition energy. With prolonged use, the spark plug gap tends to increase, leading to reduced ignition energy, which affects power output and causes vehicle shaking.