We have a 2005 Kia Sedona Van. It is jerking really bad. We took it by Auto Zone and their tester gave us codes of p0300 thru p0306. They said it was an electrical problem. There are so many things it could be. Do you have an idea where we should start. We put some Lucas injection fluid in it last night but we are only about 4 miles from there so it hasn't run very much since. The car has almost 82,000 miles.
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