# 2005 Kia Sportage need help

**URL:** <https://community.cartalk.com/t/2005-kia-sportage-need-help/80673>\
**Category:** Maintenance/Repairs\
**Tags:** sportage, kia\
**Created:** [August 1, 2013, 9:56pm UTC](https://community.cartalk.com/t/2005-kia-sportage-need-help/80673 "2013-08-01T21:56:39Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![kmt970](https://avatars.discourse-cdn.com/v4/letter/k/2bfe46/32.png) [@kmt970](https://community.cartalk.com/u/kmt970)\
**Post date:** [August 1, 2013, 9:56pm UTC](https://community.cartalk.com/t/2005-kia-sportage-need-help/80673/1 "2013-08-01T21:56:39Z")

</div>

My better half has a 2005 Kia Sportage EX v6 with 109k on it. Starting last summer when the car was driven long distances; on hot days with the AC on and off; and the cruise control on and off, the engine would start to stumble; lose power; and the check engine light would come on. I pulled the codes and found po420; po430 bad converter and po305 misfire cylinder 5. We have had the fuel system cleaned twice and the wires and plugs replaced. I also add Chevron with Techron to the fuel tank every other fill up. (She runs her car to E a lot). Know matter what we do the check engine light still goes on and off whenever it wants to. I don’t think the converters are bad there is no smell and the car runs good when the light is off. We have had the car at 3 places (1 dealer and 2 independent shops) they only give us guesses not answers. We don’t want to throw money away on guesses. Any ideas?