Here's why:
* Ignition Timing: The timing of the spark determines when the air/fuel mixture ignites. If the timing is off (either too advanced or too retarded), the combustion process will be less efficient. This can lead to incomplete combustion, reduced power, and an unstable idle. An idle that's too low or too high, or even stalling, are common symptoms.
* Valve Timing: The timing of the intake and exhaust valves also plays a crucial role. Incorrect valve timing can disrupt the airflow into and out of the cylinders, affecting the proper mixture formation and exhaust scavenging. This too can lead to a rough idle or even stalling.
In short, precise engine timing is critical for optimal engine operation, and a properly set timing is essential for a smooth and stable idle. If you're experiencing idle problems, incorrect timing should be considered a potential cause.
