Ford Posts Profit But Loses Money in Cars  DETROIT (Reuters) - Ford Motor Co. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=F.N target=/stocks/quickinfo/fullquote"&gt;F.N&lt;/A&gt; on Tuesday  reported a higher-than-expected quarterly profit as strength in  its finance arm once again offset a loss in its automotive  business.