Solutions for Unstable Idle Speed
1 Answers
The causes and solutions for unstable idle speed are as follows: 1. Idle switch not closing: When idling, turn on the air conditioning or steer the wheel, and the engine speed does not increase. Solution: Adjust, repair, or replace the throttle position sensor. 2. Air intake pipe leakage: There is an abnormal noise from the air intake pipe indicating a leak. Solution: Locate the leak, reseal, or replace the relevant components. 3. Idle Speed Control (ISC) valve failure: Check the operating sound of the idle speed control valve; if there is no sound, the idle speed control valve is faulty. Solution: Clean or replace the idle speed control valve and use a dedicated decoder to perform a basic setting for the idle speed.