Originally Posted by TexEdition

My '05 4.6 hits about 1800 or so when I first crank it, then drops to about 1100 immediately and takes about 45 seconds after that to settle at 750.. That's a cold start, when warm it still revs up on cranking but comes down to 750 right away.

What you're seeing sure isn't normal, I'd definitely take it in while ya still have warranty coverage.

I've got a cai, cat-back and Troyer tunes but it's always done the same thing, ever since new and stock..