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Engine Rough idle

Tiny
83CJ7JEEP
  • MEMBER
  • 2004 KIA SORENTO
  • 3.5L
  • V6
  • 2WD
  • AUTOMATIC
  • 158,000 MILES
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
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Sunday, March 20th, 2016 AT 11:55 PM

11 Replies

Tiny
JOHNNYT73
  • MECHANIC
  • 924 POSTS
Do you have a check engine light?
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Monday, March 21st, 2016 AT 1:21 PM
Tiny
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
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Monday, March 21st, 2016 AT 1:55 PM
Tiny
JOHNNYT73
  • MECHANIC
  • 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?
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Monday, March 21st, 2016 AT 2:03 PM
Tiny
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
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Monday, March 21st, 2016 AT 2:12 PM
Tiny
83CJ7JEEP
  • MEMBER
  • 11 POSTS
And have cleaned the throttle body which was hardly even dirty and checked vacuum lines for leaks
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Monday, March 21st, 2016 AT 2:22 PM
Tiny
JOHNNYT73
  • MECHANIC
  • 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.
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Monday, March 21st, 2016 AT 2:24 PM
Tiny
83CJ7JEEP
  • MEMBER
  • 11 POSTS
Any idea
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Monday, March 21st, 2016 AT 2:53 PM
Tiny
JOHNNYT73
  • MECHANIC
  • 924 POSTS
Could be a dirty mass air flow sensor, failing coil pack, or converter.
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Monday, March 21st, 2016 AT 2:54 PM
Tiny
83CJ7JEEP
  • MEMBER
  • 11 POSTS
Haha ok last response just popped up
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Monday, March 21st, 2016 AT 2:56 PM
Tiny
83CJ7JEEP
  • MEMBER
  • 11 POSTS
One more? Will it cause it to idle rough (the cat)?
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Monday, March 21st, 2016 AT 8:06 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 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
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Friday, March 25th, 2016 AT 11:02 PM

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