Update- I replaced the Head Temp. Sender and DME relay last week. The loss of throttle response and motor cut-out appear to be cured. Thanks for the help. It's nice to know that sometimes there's a simple cure (These days $100 and 1 hour is "simple").
On a side note: The new DME relay is made in Hungary... that's close to Germany phonetically, but I was pretty surprised.
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Dan Tolley
1987 911 Coupe
http://www.cheaterswayside.com/911/gallery.asp?sort=0&userid=294