Question about 2003 Kia Sedona

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2003 KIA Sedona, son-in-law over heated and blew head gasket. Had heads machined, replaced gaskets and re-assembled, van ran very rough, rechecked timimg marks, ok. Getting code 305, checked and found plugs fouled badly, replaced all plugs, van still ran rough with no power. Found cats plugged, probably from coolant contamination, bypassed cats for now. Van runs somewhat better until it gets to operating temp, low power and still getting code 305. Help!

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Timing belt set set wrong firing to early.this a classic case of timing gone wrong.even one notch out will result in a badly running engine.bring it back and get it retimed on the belt/chain.adrian

Posted on Mar 15, 2011

  • jcbigler Mar 15, 2011

    Kinda what I keep coming back to as well, I'll tear it down again and check it tomorrow. Thanx.

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