05 mini BMW hot car is not easy to drive.

Reasons for the unstable idle speed of BMW mini hot car: 1. Air leakage in the intake manifold, air, gasoline vapor and combustion exhaust gas that should not enter the intake manifold lead to too rich or too thin mixture, which leads to unstable idle speed of the car. The owner can judge whether the intake manifold leaks air by himself: open the engine compartment cover and remove the throttle air filter. Start the car and block the throttle by hand (if the car stops after blocking, it means there is no air leakage; If there is no flameout, there is air leakage somewhere). If there is no flameout, there is no need to turn it off in a hurry. At this time, first check the nearby pipes to see if there is inhalation. If there is inhalation, it means there is leakage.