Idling Problems

Check for vacuum leaks... that's most likely it.

GDawg said:

Check for vacuum leaks... that's most likely it.

Click to expand...

+1.

Things to check include the usual vacuum lines but also check the duct running from the MAF to the throttle body for cracks down in the corrugations.

Also check the PCV valve. If it's stuck or not sealing well it can constitute a vacuum leak too.

If no obvious external vacuum leak can be found, you might want to remove the EGR valve and check for carbon build-up that might be causing the valve to stick in the open position.