Remove the spark plug for inspection. According to its combustion status, it can be judged whether the spark plug is matched and the working state of the engine is normal.
Good: the surface of the spark plug is clean, the color of the electrode is brown, yellow or yellowish white
Carbon deposit: The surface of the spark plug is black, with carbon deposits or oil stains, indicating problems.
Overheating: There is ablation spot on the surface of the spark plug, the color is grayish white, indicating a problem
What is a resistive spark plug:
Resistive spark plug means that a 5 ohm ceramic resistor is installed inside the spark plug, which can effectively reduce the interference of the spark plug to the automobile electrical appliance, avoid interference with the radio, and protect the computer board on the EFI vehicle from interference. damage.
Numbering method for spark plugs:
For example: F6RTC
RTC indicates the characteristics and main dimensions of the spark plug
F indicates the type of spark plug structure;
6 means that the spark plug calorific value is 5-6-7-8, indicating that it is hot to cold;
R is expressed as a resistive type;
T is expressed as an insulator protruding type;
C indicates that the center electrode is nickel-copper conforming to the electrode type;