What should I do if the idle speed of Dongfeng Xiaokang k 17 engine is high?

There are several main reasons for high idle speed:

1, the idle switch is not turned off;

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.

Solution:

1. Adjust or replace the throttle position sensor;

2. Clean or replace the idle speed control valve, and use a special decoder to basically set the idle speed;

3. Find the leakage point, seal it or replace relevant parts;

4. Check the timing mark and readjust the valve timing according to the standard;

5. Clean and check the fuel injection quantity of each injector to confirm that there is no blockage or leakage;

6. Replace the three-way catalytic converter;

7. Remove the carbon deposit on the EGR valve or replace the EGR valve.

Extended data:

classify

Normal idle speed

When the vehicle is parked and the engine is started, the lowest rotation speed of the engine running stably is called parking idle speed (the process that the engine changes from the idle state of cold car to the idle state that the engine reaches the normal working temperature is called warm car or hot car).

Driving idle speed

When the car is in gear, the minimum opening of the throttle valve remains unchanged, and there is no need to step on the accelerator pedal or loosen it when driving. At this time, the engine speed is consistent with the parking idle speed, which is called driving idle speed.

Idle speed instability

Idle instability is the most common fault in engine maintenance. If the diagnosis idea is incorrect, it will prolong the maintenance time, reduce the work efficiency, and even let the owner transfer to another garage without waiting.