Are they all loud outside the truck? inside it is quiet and smooth, but when you are standing outside the truck it is really rough sounding, definitely not as quiet as my 98 Expedition 5.4.

 

I have had mine for about a week and I think it is WAY TOO QUIET. I traded my 04 in for it and I can't even thell the 07 is running, inside or out. I can't wait to put a intake and exhaust on it to make it sound more manly.

 

My wifes has a 2007 Expedition and you can't hardly tell if it is running or not when you stand outside of it. I think you may have a problem but I no nothing about automotive engines. Go back to the dealer and get them to start another one of the same truck for you. See if it sounds the same as yours.

Good luck...

 

any shaking from the engine like a mifire?

 

No shaking, on the inside it is smooth. I have never taken it over 2,000rpm, cause it has had plenty of power to move without much throttle.

I just notice when I am on the outside, you can really here the engine running, it is pretty loud, louder than my Mustang GT.