Slow to idle? Anyone else? Why?
 

All of my buddies are pretty much chevy guys, one has a 84 T-bird w/460 bb, but he is the only other Ford guy. Anyway, when the rev up their engine, in nuetral or park, they idle down almost as fast as they rev up. When I do or any 4.6 for that matter, do this, it revs up fast, but idles down super slow. What causes this, and is it all 4.6's or just a few? Does Ford have a reason behind it or just to make us sound stupid?

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97 Aztec Gold GT w/Steeda heads,intake,TB,
shifter,headers, subframe conn. 3"flowmaster exhaust and
125 hp NOS

I am not sure, but my 5.0 kind of does the same thing. It drops back down to about 1500 pretty quick, but then takes a bit to drop all the way back to idle.

That's normal. It's a emmisions deal to burn up all the gas.

Even with an offroad H-pipe though? or is it the computer, not letting it idle down as fast.

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97 Aztec Gold GT w/Steeda heads,intake,TB,
shifter,headers, subframe conn. 3"flowmaster exhaust and
125 hp NOS