Spark is allowed by the following items
crank position sensor
cam shaft position sensor
immobilizer
ignition control module
check that what you did to fix the engine light didn't intere with something else
SOURCE: my check engine light is on, i took it down to
Misfire can be more specifically diagnosed with the engine scanner than they are telling you...The code relating to " multiple engine misfire" usually implies the need for spark plug replacement. A specific code such as # 3 cylinder misfire implies a problem with the spark plug wire or individual coil pak depending on which system you have...Most chain parts stores will offer checking codes for you at no cost...
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+
SOURCE: my car has a multiple misfire the check engine
Remove the spark plug using a ratchet, 12" extension, and swivel spark plug removal socket of the appropriate size for your spark plug hex (5/8" or 13/16" or metric).
Check the gap and make sure it is within specs. as listed on the sticker on your car or manual, if so equipped.
Also, note that a multiple misfire can be the result of a plugged up or dirty or bad O2 sensor.
Have the car scanned by the Kia Dealer, Advance or Autozone to see if what codes you OBD-II system has.
How many miles do you have on it?
Thanks for asking Fixya.com.
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