Why does the car still fail to start after replacing the spark plugs?

[Jaxson]

The reason why the car still fails to start after replacing the spark plugs could be a malfunction of the spark plugs themselves, or improper installation leading to poor contact between the spark plugs and the ignition module, resulting in no spark. Identifying the cause of the fault: For diagnosing faults such as the engine failing to start, the first step is to check the battery. It is essential to determine whether the engine's failure to start is due to insufficient battery power. Checking ignition timing: Slippage of the timing belt is the root cause of the failure to generate an electric spark and the engine's inability to start. Checking the starting system: For faults like the engine failing to start, the first task is to inspect the circuits in the engine's starting system. In its most basic form, the starting system's circuit generally includes the following fundamental components. Namely, the battery: Starting motor and the cables connecting these components. Of course, in addition to these, the ignition switch, starter relay or solenoid coil, and the vehicle's anti-theft system are also important parts of the starting system. Checking the quality of the electric spark: Once the starting system's circuits have been inspected and confirmed to be fault-free, attention should then be focused on why the engine cannot operate. The first thing to check is the engine's ignition system, which is also the simplest inspection task.