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When the car is on idol or if its running the engine seems to be missing.

(2009 Kia Rio)
in Victoria, TX on September 24, 2013
It doesn't excellerate like it use to and the engine light stays on.
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Popular Answer
on September 25, 2013
Coil on plug misfire, as stated scan test needed to determine which cylinder is the problem.
of Greg's Orange Auto on September 25, 2013
agree scan codes and post you most likely have misfire data in ECM
on September 24, 2013
scan test for codes and go from there
on October 03, 2013
Check your coil packs. I have a 2007 kia. No problems until this summer. I have replaced 4 coil packs in the past few months. First signs are check engine light comes on and the car begins to start missing. Excerlation decreases...
not a happy kia owner at present!
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