What is the flameout gap of BMW 5 Series cold car?

The most common reason for the shaking and flameout of the BMW 5 Series cold car in Pacific Auto Network is carbon deposition, which usually appears in the inner wall of throttle valve, intake head, intake port, piston top and combustion chamber. Go to the repair shop to find out the specific reasons and solve them as soon as possible, so as not to affect the use of vehicles. Automobile stall in neutral is either an air intake problem, too little air intake leads to low-speed stall, or an oil circuit problem, too little idle fuel injection in neutral leads to low-speed stall.

The most common reason for the start-up jitter and flameout of BMW 5 Series cold car is carbon deposition. Carbon deposits generally appear in the inner wall of throttle valve, intake valve head, intake port, piston top and combustion chamber. It is suggested that the owner go to the repair shop to find out the specific reasons and solve them as soon as possible so as not to affect the use of the vehicle.

Excessive carbon deposition on the inner wall of the throttle will cause insufficient air intake, difficult starting or easy flameout at idle speed. After the water temperature reaches the normal working temperature of the engine, the idle speed rises and falls due to the excessive opening of the throttle valve exceeding the normal idle speed value, and the computer repeatedly adjusts the position of the throttle valve plate.

The surface of carbon deposit is loose, similar to sponge. After stopping for a night or a long time, when the cold car is started, most of the fuel injected by the injector is absorbed by carbon deposits. The amount of fuel entering the cylinder is insufficient, and the mixture is thin and difficult to ignite. The motor is running, and the fuel entering the cylinder is enough to ignite after multiple injections. In this case, it will definitely be difficult to start. What's more, it will be more difficult to start a cold engine if carbon deposits accumulate too much at the head of the intake valve and the valve is not closed tightly. Even if it can be barely started, it will be closed soon.