Weipai vv5 started late and the idle speed was still high.

The reason is: 1, the idle switch is not closed; 2. Idle speed control valve is faulty; 3. Air inlet pipe leaks; 4. Wrong gas distribution phase; 5. The fuel injector leaks or is blocked; 6. The exhaust system is blocked; 7.EGR valve opens at idle speed; 8. The throttle is out of order.

Reasons for sudden increase of vehicle idle speed:

1, caused by excessive air intake and supply, excessive oil pumps or incorrect engine control data signal at idle speed;

2. When the engine starts cold, the idle speed rises, and some aluminum engines exhaust heat too quickly, so it is very efficient to restart the exhaust ignition. Therefore, if the engine speed is relatively low in the case of ignition, there will be under-combustion, resulting in excessive carbon deposition or lack of cylinder, so a high speed ratio is the maintenance of the engine during ignition;

3. When the air conditioner is blown, the idle speed increases. After the air conditioner is turned on, the engine must have additional driving force to drive the refrigeration compressor, which is the load increase. Therefore, it is necessary to increase the ignition advance angle to fill this driving force, and the idle speed will increase.