Suzuki Keiyue is unstable when idling, from 500 rpm to 700 rpm from time to time, and then back to 5

Suzuki Qiyue is unstable when idling, from 500 rpm to 700 rpm from time to time and then back to 500 rpm, this is mostly related to the dirty throttle, it is recommended to check whether the throttle of the car needs to be cleaned.

Unstable idling can be due to the following reasons:

1. The engine has serious carbon deposits.

When the carbon deposit inside the engine is too much, the gasoline sprayed out by the cold start fuel injection head will be absorbed by the carbon deposit in large quantities, resulting in the mixture of cold start being too thin, making it difficult to start, in this case, only when the gasoline absorbed by the carbon deposit is saturated, it is easy to get on the car, and the gasoline adsorbed on the carbon deposit after the car will be sucked into the cylinder by the vacuum suction of the engine for combustion, and the mixture becomes thick, and the combustible mixture of the engine is dilute and thick, causing idle shaking after cold start.

2. Excessive fouling of the throttle and inlet tract.

The excessive carbon and dirt deposits in the throttle valve and the surrounding air intake, and the change in the cross-sectional area of the air channel, make the control unit unable to accurately control the idle air intake, resulting in the mixture being too thick or too thin, and making the combustion abnormal.

3. The spark plug spark caused by individual spark plug failure is too weak.

Spark plugs can also build up carbon, which can be cleaned to restore spark plug activity, but some spark plugs are nearing the end of their useful life and their performance will be reduced. The spark plug spark on the individual cylinder is weak, which will affect the performance of the car, and the spark plug failure will cause the car to have the symptoms of "lack of fire", but the spark plug of the individual cylinder will have idle instability symptoms if there is a slight fault.

4. Fuel pressure failure.

If the oil pressure is too low, the atomization state of the fuel injected from the injector is poor or the fuel injected is linear, and only oil droplets are sprayed in serious cases, and the amount of fuel injected is reduced to make the mixture too thin; The oil pressure is too high, and the actual fuel injection volume increases, making the mixture too concentrated.

5. Failure of various parts.

Leakage of intake manifold or various valves, failure of fuel pressure, low oil pressure, failure of ignition system, etc., can also cause engine idling instability.

Summary. Hello, I'm helping you sort out the answer to your question, please wait a while Suzuki Kaiyue idle speed does not shake more than 80 and shakes 100 after that.

Hello, I am helping you sort out the answers to your questions, please wait a while Hello, I am your exclusive technician, attentive, careful, and dedicated to answering your car questions, and finding solutions and solutions to the corresponding problems for you! The relevant scheme is as follows: you are a tire dynamic balance is not good, because the car has been searched for a long time, there will be some wear and tear and deformation of the tire rim when running on the road, so it will shake you, you only need to go to the repair shop or tire shop to make a tire dynamic balance, and then check whether the steel rim has changed.

I checked it, the dynamic balance was done, the four-wheel alignment was also done, and it was still shaking.

The balance is done! Focus on checking whether the steel ring and half shaft are deformed can be straight.

After 100 cars, it won't shake.

Yes, this is the fault phenomenon caused by the deformation of the tire or steel rim, or the deformation of the loose ore of the half shaft. Good.