I don't need a Mazda engineer to tell you that.
It's not the instruction manual that's wrong, it's just that poverty limits people's imagination.
After the cold car starts, the idle speed will be high, then the idle speed is 1500 RPM or 2000 RPM, as long as you do not step on the accelerator, the speed is stable, and the current speed is called idle. 10 seconds to \"D\" and out. No problem.
The operation is not smooth, everyone does not know, is now the car is too good a lot of people have not experienced, a lot of old cars, about minus 30 degrees will appear. A car today, a new car, doesn't even have to be minus 40.
The high idle speed of the cold car is mainly not for fast warming, but for smooth operation, and the fast warming car has 1200 to turn enough.
When the old car is cold, the ignition is finally played many times, when the tachometer pointer will swing around a few times between 500 revolutions and 2500 revolutions, and the sound can be heard, the speed is up and down. Maybe the revs will level off. Maybe it'll stall. This is called idle instability. At this time, the gear will directly turn off the fire, maybe you need to play again, maybe you can't play anymore. You must find a warm storage to warm up, check whether the starter is bad, and re-ignite the t battery after charging, delaying the time.
The speed is not stable, the old car is too cold will happen, Mercedes-Benz BMW will happen, Porsche Martha Ladi is no exception. Some people who play racing will like to coax the accelerator to hang D gear, and will have the pleasure of scratching the tire.
When the throttle is fired, the speed may be at 5000 RPM to 6000 RPM. At this time, the gearbox is not strengthened, and directly hanging the D gear will burn the gearbox. So the instructions tell you not to do that.
The reason is that the consequences of cylinder flushing lead to a large number of carbon deposits. BMW 523 car flameout without oil when it is cold is because the fuel injection nozzle cannot inject oil normally, so it cannot inject oil normally. The result of flameout caused by oil injection needs to replace the engine cylinder
Cold car start off may be too much carbon, it is recommended to go to the professional 4S shop check, to professional master test