Why did Souranto 3.5 idle at high speed in 2006?

The reasons for the high idle speed of Souranto 3.5 in 2006 are as follows:

In 2006, the idle speed of KIA Souranto was unstable. Personally, I think it may be caused by excessive carbon deposition in the engine. I suggest checking whether the spark plug of the car needs to be replaced and whether the throttle needs to be cleaned.

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.