Why won't my old Santana start?

[DiIsla]

The reasons why an old Santana won't start are as follows: 1. Check if the battery voltage is too low: Turn on the headlights and some electrical devices to observe whether there are noticeable changes in the brightness of the dashboard and interior lighting during the starting process. If they dim, it indicates insufficient battery voltage. 2. Excessive carbon buildup in the intake manifold: Too much carbon deposit on the throttle body or idle speed control valve can prevent the engine from achieving the required air-fuel ratio, making the vehicle unable to start. This may also cause repeated clicking sounds from the solenoid and starter relay. 3. Insufficient fuel supply in the fuel system: This issue is fundamentally similar to excessive carbon buildup in the intake manifold, as both prevent the engine from achieving the required air-fuel ratio, resulting in failure to start.