Check the high pressure fuel pump there is a little metal ring around one of the lines that might be loose and vibrating. I dont thing it matters that its loose besides it being annoying as hell so just zip tie it or whatever. Harbor Freight sells this stretchy rubber sealant tape that sticks to itself for $5 its better than dust tape and wire cost hangers! Lol. Another thing to check (it doesnt sound like the issue your referring to, but since your in the vicinity...) Right behind that area about a foot down on the firewall is a cheap plastic clip holding 2 fuel lines that make this rattle noise when your idling especially when in drive like at a stop light. Its one of those noises that make you want to freak out ?! Zip tie those suckers down nice and tight too... but other than that like the other guys said the ticking is normal. The rattles are due to ford being to cheap to actually fasten things down properly!