Hey guys, my 09 Kia had a check engine light for misfires in all 4 cylinders. It only has 88289 miles too. I got brand new Spark plugs and gapped them to .43 (Specifications) and it didn't change anything. I was getting about 13 miles to the gallon highway. It was running richer than Bill gates. I finally got Mass airflow sensor cleaner and cleaned it, reset the codes, and it came back as pending, but only 1,3,4 were tripping codes. I have already ordered a MAF from NAPA. Do you guys have any suggestions? Thanks in advance
God Bless you all
What are the codes? It is probable, hopefully, that only the injectors are shot.
PO304, PO303,PO300,PO301, PO302. All misfire codes, but PO300 was a 'Random Misfire Detected'. The motor shakes when idle, and make a tapping/ticking noise. And then yesterday, i was driving from illinois, and my scanned it at parts store, becuause the gas was being sucked in a lot more, and it said my MAF sensor is bad. They were also all Pending
All these misfire codes still points to fuel system problems. The MAF sensor could be bad, but with a dirty air filter, it could show a code too. Going from easiest to hardest, I would check the air filter, properly clean the MAF with only MAF cleaner, run some injector cleaner through the system (Techron or Berryman B12) and replace the PCV valve and clean the MAP sensor on the valve cover. Hopefully, these relatively small steps will take care of it. Good Luck!