What Is The Cause Of Idling Jitter After Changing The Spark Plug?

After replacing the spark plug, due to the change of ignition performance, the engine power changes at idle speed, the air-fuel ratio is "not" correct, and the vehicle condition performance changes. The trip computer ECU needs to learn and adjust itself.
Spark plugs have different materials and classifications, such as nickel alloy spark plugs, platinum spark plugs, iridium spark plugs, double iridium spark plugs, etc. In terms of ignition performance, the performance of nickel alloy is less than that of iridium, because the iridium tip discharges and ignites quickly, which is easy to understand. What if it is very old? It is the old nickel alloy spark plug When changing from old spark plugs to new spark plugs, some car owners feel more sensitive. They feel that the accelerator is lighter, the acceleration is faster, and the performance is changed. Some car owners feel less sensitive, but they don't feel any change. Even if the performance change of the spark plug is small, the change of various sensors and ECU of the trip computer can be calculated.