What are the reasons for the NK400 not starting?

[AlanaDella]

The reasons for the NK400 not starting are as follows: 1. Check if the battery voltage is too low: You can turn on the headlights and some electrical devices to observe whether the dashboard and interior lighting dim during the starting process. If they noticeably dim, it indicates insufficient battery voltage. 2. Excessive carbon buildup in the intake pipe: Too much carbon deposit on the throttle body, idle speed motor, etc., prevents the engine's air-fuel mixture from reaching the required ratio, causing the vehicle to fail to start. The repeated engagement of the magnetic pack and starter relay may produce a clicking sound. 3. Insufficient fuel supply in the fuel system: This issue is similar to excessive carbon buildup in the intake pipe, as it also prevents the engine from achieving the required air-fuel mixture ratio, leading to the vehicle's failure to start.