The idle speed of Wuling Wangxing automobile is unstable, sometimes high, sometimes normal. How to solve it?

The reasons and solutions for the unstable idle speed of Wuling Wangxing automobile, which is normal when it is high: 1, the idle speed switch is not closed.

Diagnostic method: Turn on the air conditioner and turn the steering wheel when idling. The engine speed does not increase, which can prove this fault.

Troubleshooting: Adjust, repair or replace the throttle position sensor.

2. Idle speed control valve (ISC) is faulty.

Diagnostic method: Check the starting sound of the idle control valve. If there is no starting sound, the idle control valve is faulty.

Troubleshooting: Clean or replace the idle speed control valve, and set the idle speed with a special decoder.

3. The air inlet pipe leaks.

Diagnosis method: If you hear the smell of air leakage in the intake pipe, it proves that the air intake system is leaking.

Troubleshooting: Find the leakage, reseal or replace the phase parts.