Engine misfire on cylinders two, four and six?

Tiny
LJC2006
  • MEMBER
  • 2007 KIA SPORTAGE
  • 2.7L
  • V6
  • 2WD
  • AUTOMATIC
  • 153,000 MILES
My engine seems to run fine, but I have a check engine light on and ODB codes for misfires on cylinders 2, 4, 6 as well as multiple cylinder misfire. I've replaced the ignition coil, affected spark plugs, affected spark plug wires, oil cap, distributor vacuum advance hoses (they were cracked), and cleaned the MAF. Light is still on.
Saturday, February 3rd, 2024 AT 10:58 AM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,690 POSTS
Yep, yep, this is caused by a bad catalytic converter on the same side as the misfires. Here is how to remove it so you can inspect the catalyst material inside. The converter you are looking at will be on the left side of the engine, (closest to the front of the car). This is a common problem. Check out the images (below). Please upload pictures or videos in your response to the problem so we can see what's going on.
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Saturday, February 3rd, 2024 AT 11:24 AM
Tiny
LJC2006
  • MEMBER
  • 2 POSTS
I don't have time to look at this today but thank you for the help. I'd seen this on another forum and dismissed it to look at easier solutions, but I'll take a look at it soon.
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Saturday, February 3rd, 2024 AT 11:49 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,690 POSTS
It is pretty much the only thing that can affect all the cylinder on one side, so I am pretty sure this is the problem.
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Sunday, February 4th, 2024 AT 11:02 AM

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