Engine Rough idle

2004 KIA SORENTO
158,000 MILES • 3.5L • V6 • 2WD • AUTOMATIC
Avatar
83CJ7JEEP
  • MEMBER
  • 11 POSTS
Rough idle and in gear car stopped. Last year replaced timing belt water pump plugs and wires and a bad 02 sensor. And once in a blue moon it will like miss fire going down the road a few time an go away. Advance auto said it was a bad cat I know different things can send same code what could this problem be. About to go crazy here
Mar 20, 2016 at 11:55 PM
Advertisement
Avatar
JOHNNYT73
  • CERTIFIED EXPERT
  • 924 POSTS
Do you have a check engine light?
Mar 21, 2016 at 1:21 PM
Avatar
83CJ7JEEP
  • MEMBER
  • 11 POSTS
Yes I said in ? That advance auto said it was catalyin converter But no lack of power at all and I have read that other things can throw the same code
Mar 21, 2016 at 1:55 PM
Advertisement
Avatar
JOHNNYT73
  • CERTIFIED EXPERT
  • 924 POSTS
Ok, you didn't say you had a code. You just stated what the store told you. You could have just asked for advice there such as you are here, and you didn't supply this site with a code. My guess is that you have a P0420 code?
Mar 21, 2016 at 2:03 PM
Avatar
83CJ7JEEP
  • MEMBER
  • 11 POSTS
Haha these people will hire anyone that can type on a keyboard. They don't know there a-- from a hole in the ground an didn't tell me what code it was
Mar 21, 2016 at 2:12 PM
Avatar
83CJ7JEEP
  • MEMBER
  • 11 POSTS
And have cleaned the throttle body which was hardly even dirty and checked vacuum lines for leaks
Mar 21, 2016 at 2:22 PM
Avatar
JOHNNYT73
  • CERTIFIED EXPERT
  • 924 POSTS
Ok, if you can I would go and have then check the code and tell you what the code is. If it is a P0420 then it wold tell me that your converter is not efficient.
Mar 21, 2016 at 2:24 PM
Avatar
83CJ7JEEP
  • MEMBER
  • 11 POSTS
Any idea
Mar 21, 2016 at 2:53 PM
Avatar
JOHNNYT73
  • CERTIFIED EXPERT
  • 924 POSTS
Could be a dirty mass air flow sensor, failing coil pack, or converter.
Mar 21, 2016 at 2:54 PM
Avatar
83CJ7JEEP
  • MEMBER
  • 11 POSTS
Haha ok last response just popped up
Mar 21, 2016 at 2:56 PM
Avatar
83CJ7JEEP
  • MEMBER
  • 11 POSTS
One more? will it cause it to idle rough (the cat)?
Mar 21, 2016 at 8:06 PM
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,871 POSTS
Probably not the cat on the rough idle problem try this article and get back to us with what you find

https://www.2carpros.com/articles/engine-vibration-at-idle
Mar 25, 2016 at 11:02 PM