How to maintain a car with an electronic throttle when the speed is too low?

Generally, when the idle speed is low, the first thing to do is to distinguish whether the idle speed is too low or the cylinder is missing.

If the idle speed is too low, you can clean the throttle.

Then if it doesn't work, check the data flow with the computer to see if there is any problem with the air intake.

If the cylinder is missing, the fuel injection system, ignition system, cylinder pressure and timing need to be overhauled! If there is something wrong with your car, ask the car mechanic. 4S shop professional technician, 10 minutes to solve.