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Idles real ruff has died a couple of time reads multiple misfires

(2002 Cadillac Seville STS)
in Land O Lakes, FL on April 10, 2013
Have replaced all spark plugs, coil packs, even air flow censer also has new fuel pump, and water pump
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Popular Answer
on April 11, 2013
Monitor with scanner (live data) to see what's causing the misfire.
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