Question about 2011 Kia Rio

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When I had the random misfire code in cylinder 2 I swapped the coil pack to slot 1. The check engine light turned off and ran fine for a day or so. I was trying to see if it was the coil or the spark

I put all of these details in the question. Should I get a new cylinder and just try to guess that the initial code was right?

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More then likely the code was right if it was me I would change my plugs if it didn't fix it I would change my coil pack and that should solve the problem

Posted on Nov 07, 2014

Testimonial: "I changed the spark plugs and it is seemingly working like last time. When I scanned it this time the code said random misfire in cylinder 1 and 2 as well as a general random misfire. Hopefully the spark plugs did the trick."

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Posted on Jan 02, 2017

  • 14036 Answers

SOURCE: 2000 Kia Sephia p0303 code engine misfires

do a compression test. cylinder 3 could have a bad valve lifter or valve.kia sephia dont have push rods.it have a bucket type followers.a intake leak to that cylinder can also cause misfire problems.

Posted on Jun 06, 2009

  • 257 Answers

SOURCE: 2004 kia optima arcing around the coil pack

the coil pack mybe bad

Posted on Aug 11, 2009

roniecon
  • 6826 Answers

SOURCE: 2003 kia # 3 misfire/ runs rough

Replace the coil for number 3 cylinder.

Posted on Nov 11, 2009

  • 192 Answers

SOURCE: Took my car to have check engine light checked. It

In modern cars so much can go wrong to indicate an issue and a computer in the car can get confused as to what is really occurring. In most cars a misfire indicates either an incorrect firing order, shorted wires, bad plugs, or bad coil. Since you have replaced the wires and plugs we can rule those out. Im also assuming after the second engine code you pulled #2 plug and made sure it wasnt fouled with oil, was gapped correctly, and reinserted. To produce a sufficient spark for combustion the alternator sends power to a "Coil" which is in reality a storage point that then sends an amplified electrical current down the spark plug wire to the cylinder to fire the plug. If the car is truly misfiring you will notice a rough idle, fluctuating RPM's, and lack of acceleration. If you are experiencing any of these I would look at replacing the coil. If you arent experiencing any of these I would have the code cleared again and complete one drive cycle 100 miles and then have codes read again. If you still get a Misfire error some other causes known to occur with Rio's are fuel filter issues, gas caps, and fuel injector issues. Although rare, these can cause issues with the cars fuel delivery and emissions which can confuse the sensor in the ECU. I would try injector cleaner, replace the fuel filter, and gas cap . If funds are an issue then based on symptoms I would start with injector cleaner first $3, Filter $12, Gas cap $12, Coil $48 to $200+

Posted on Jun 06, 2010

  • 320 Answers

SOURCE: My check engine light is on in my 2004 Kia sorento

disconnect the negitive cable for about an hour. This should clear the codes.

Posted on Mar 10, 2012

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