Engine - Rough Idle/Stalling

SOURCE: Kia Technician Times

TITLE: Rough Idle/Stalling

APPLIES TO: Sportage

SERVICE TIP:

CONDITION

Some Sportage owners have reported that their vehicles have a rough idle and/or stalling at idle condition. Typically, this condition occurs more often during cold engine operation.

CAUSE

There can be several causes for a condition like this so be sure to troubleshoot thoroughly. One of the more common causes on the Sportage is a blocked or otherwise restricted Idle Air Control (IAC) passage in the air intake pipe assembly. This passage allows air to pass from the intake pipe, through the IAC valve, to bypass the throttle plates in the throttle body. If this passage becomes blocked or restricted, the engine will not idle properly.

CORRECTIVE ACTION






1. Remove the IAC valve.






2. Using a flashlight, inspect the lower IAC passage in the air intake pipe assembly for blockage or restrictions.






3. If blockage is present, remove the air intake pipe.
4. Using small hammer and punch, remove any blockage. Thoroughly remove any debris left in the IAC passage.
5. Install the air intake pipe and the IAC valve.
6. Start the engine and check for correct idle speed.