Can the Jetta save fuel in neutral when coasting?

There are two reasons for a gluck when the neutral gear is up, one is that the gear is not suitable, and the other is that the clutch is lifted too quickly. However, it is generally the reason why the clutch is lifted too quickly. Whether coasting in neutral is fuel-efficient, let me talk about my opinion:

One is a carburetor carburet. Because of the design of the carburetor, the amount of fuel injected is determined by the amount of air intake. That is to say, the higher the engine speed, the greater the air intake, the greater the amount of fuel used, and the more fuel consumption, so as a carburetor car, neutral coasting is theoretically fuel-efficient.

The second is the EFI truck. This is to talk about the working mechanism of the engine computer, the engine computer will control the fuel injection volume of the fuel injector according to a series of data such as vehicle speed, throttle opening, water temperature, air intake, intake temperature, oxygen sensor data, engine speed, etc. When the throttle is open and the air intake increases, the computer thinks you are accelerating, so it injects more fuel, and when the throttle is closed, the computer thinks it is decelerating, and the computer will reduce the amount of fuel injected or not inject, and continue to inject fuel to maintain idle speed when the engine speed drops to a certain level.

When we coast in gear, the throttle closes, the air intake drops sharply, and the computer thinks you're slowing down, and it injects less or no fuel until the engine drops to idle and then injects fuel to maintain idle. If you're skiing in gear and the computer will be idling and injecting fuel during the distance, do you want the computer to inject less fuel or no fuel when coasting? Or is it better to spray oil to maintain idling?

Of course, the above analysis is only theoretical, in practice the car conditions are ever-changing, I personally recommend that you drive in the city please judge the situation by yourself, run long distances recommend that you more gear coasting. Personal advice, for reference only.

Is it really fuel-efficient when the car is coasting in neutral?

After the car is warmed up, it is normal for the engine to idle at about 800 rpm, and if the rpm reaches 910 rpm, the fuel consumption will definitely increase at this time.

If the volume of the throttle is too carbon, the idle speed will be high, and the high idle speed will inevitably lead to an increase in fuel consumption. Secondly, the high idle speed will also have a certain relationship with the electronic control system, and the idle control system of the electronically controlled engine is mainly composed of various sensors, signal control switches, electronic controllers and idle control valves. According to the input signal of each sensor, the ECU controls the engine to keep it in the best working condition, and checks whether the input signal from each sensor to the ECU is normal when the idle speed is high.

Dear users just after washing the throttle should be matched with the computer, so that the engine data can be restored to the initial state, if you have cleaned the throttle has been matched by the computer, you need to check whether the engine has a slight leak, or the throttle has a mechanical failure. I hope my answer will be helpful to you. Beijing Automobile Repair Company & Auto Repair Factory Borui Xianghong.

Hello: For the question you asked, the EFI car is fuel-efficient when coasting with gear, because the engine of the EFI truck is coasting at high speed with gear, the driving computer of the EFI vehicle is stored with the program of "deceleration and fuel cut-off", if the vehicle is running at a high speed of more than 3000 rpm, the driver suddenly releases the accelerator, the speed decreases, and the engine speed decreases, the driving computer will control the fuel injector to make the action of "deceleration and fuel cut-off", and there is no fuel injection and fuel combustion in the cylinder body at this time. When the engine speed drops to 1200-1500 rpm, the fuel injection returns to normal.

Therefore, coasting with gear is fuel-efficient. It is recommended that you try to coast, when the engine speed is higher than 1200 rpm, when the engine speed is higher than 1200 rpm, pick up neutral gear and coast when it is lower than 1200 rpm or when the engine is about to idle speed, which should be the most fuel-efficient way to ensure safety. Remind you to pay attention to driving safety, I hope my answer will be helpful to you.