I am a modern (old) Santa Fe off-road vehicle (gasoline), with a displacement of 2.7, and have driven10.2 million kilometers. Recently, there has been a phenomenon of throttle lag.

Check the data flow on the computer first, then clean the throttle valve body, and then check the spark plug to see if the calorific value of the spark plug is correct (the calorific value of each car is different, and many people do not refer to this index when replacing it). After excluding these two, it is basically that the gearbox slipped! Pull out the automatic transmission dipstick to check whether the liquid level is clean, and then smell it well. If it is not clean or smells. Basically draw a conclusion.