What causes the spark plug to smoke?

The causes of spark plug smoke are: the concentration of mixed steam is too high; The clearance of the valve train is very large; Incorrect calorific value of spark plug; Vehicle burning oil; Excessive carbon deposition in vehicles. Spark plug is an important part in the ignition system of automobile engine, and it is also a vulnerable part that needs to be replaced regularly. If the spark plug is not replaced for a long time, the electrode gap will become larger, which will affect the ignition energy of the spark plug, and carbon deposition will also appear on the electrode, which will affect the normal ignition of the spark plug. The replacement time of spark plug depends on its type: the replacement cycle of nickel alloy spark plug is 20 thousand to 30 thousand kilometers; Nickel-yttrium alloy spark plug 30 thousand kilometers; A single platinum spark plug is 40,000 kilometers; Double platinum spark plug 60 thousand kilometers; 80,000 kilometers of iridium spark plugs; The replacement cycle of platinum-iridium alloy spark plug can reach 654.38+ 10,000 kilometers. Million car purchase subsidy