2003 kia vibrates after warmed up
Try cleaning your idle air control valve. Here's a short how to video: http://www.youtube.com/watch?v=jgbTdyeaWbM
I replaced IAC, maf. even had a garage do test for leaks. changed plugs, wires etc. it's ok when cold but vibrates when warmed up
Try replacing the ambient air temp sensor. I know that it relays info to the computer which regulates idle.........
Looking for a Used Rio in your area?
CarGurus has 7,154 nationwide Rio listings starting at $1,500.
Search Kia Rio Questions
Kia Rio Experts