My 97 Contour makes that sound, pretty much all the way through the RPM range... But it's a relatively quiet engine...my friend was riding in it a couple days after I got it, and he agreed that it was really super quiet...and I noticed that I can't rev at anyone in traffic, cause they won't hear me... Maybe that's not such a bad thing... Keep myself out of trouble, hehe.

But yeah, my former car, an 02 ZX2 with Zetec, made that sound at high RPM, and my afformentioned friend who has a 92 Probe, his car makes the same type of sound...though his just sounds like a jet engine, hahaha. Not a bad sound for a Probe on its last legs with an automatic tranny...
So I guess it's common in Fords...

:shrug: