One way to find the bad row is to import it into a two column table (1 for a row num, the other for the data). You know how many quotes there should be for all the rows... if you do something like the following, it may find the row...
SELECT RowNum, TheData
FROM yourtemptable
WHERE LEN(TheData) <> LEN(REPLACE(TheData,'"',''))
--Jeff Moden
Change is inevitable... Change for the better is not.