Question about 2006 Kia Rio

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#2 misfire, changing plugs and have oil in #2 cylinder. Could that be head gasket?

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No your #2 rings bad allowing oil to by pass cylinder filing plug auto stors sell an adapter for your spark plug that will let plug last a lil longer or have shop replace rings

Posted on Feb 02, 2010

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Sounds like he has it sorted. Get it thoroughly checked over for bad leads, poor compression on one or more cylinders, valve or valve gear damaged. Its 15 years old, has it been regularly serviced? What mileage has it done? Is there oil in the water or water in the oil leading to the head gasket leaking. Something which happens after running without proper coolant which rots the gasket.

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A lean fuel mixture will not yield poor fuel economy but a misfiring cylinder will.You have already replaced the coils and the plug leads to the cylinders in question so they should not be an issue.Do the codes still indicate a misfire on cyls. 2 & 3? If so have you looked at the plugs? Has the oil leak around the plugs been stopped? Are they oil fouled? Could the pooling oil around the plugs be shorting the spark discharge to ground?or Valve Cover gasket is leaking. That's why you see some motor oil in the sparkplug sleeve (tube). removed the spark plug and My suggestion is to remove the sparkplug in cylinder 2 & 3 or whichever ones that the scanner indicated as "misfiring". Take a look at the sparkplugs and see if there's any oil around it. If you see any traces of oil, that means your gasket is worned out and need to replace.Good Luck in getting your problem fixed. If you need any further help - I'll try to help you the best of my knowledge and skills. You can repost on this

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Sound like an air / vacuum leak to me.
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