Hi,
Hmm...that kinda sux...I only had it idle for a while before I turned it off. When I turned it on later on, it was about 20, and then came down to about 16 or so when I drove off, so I didn't get an accurate reading. I dunno, I'll run the car more and see how it goes.
Several folks here have said it sounds like a cam, and so did a few mechanics.
Bye!
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Gautam N. Lad
http://www.cubicdesign.com
http://www.cubicdesign.com/mustang/