What Causes a Car to Keep Running After Removing the Key?

[DiBrielle]

This issue occurs due to a malfunction in the ignition startup module. Below is relevant information about automotive ignition systems: 1. Function: The ignition system's role is to connect or disconnect the primary circuit of the ignition system according to signals from the signal generator, thereby generating high-voltage ignition current in the secondary winding of the ignition coil. Modern automotive ignition systems feature various internal circuit designs, but their fundamental functions are largely similar, consisting of corresponding functional circuits. 2. Components: The ignition system primarily consists of the power source, ignition coil, distributor, ignition switch, spark plugs, additional resistors with their bypass devices, and high/low voltage wiring.