I dont know how much of a problem this is but it is bugging the heck out of me. also i would rather talk to you guys first before going to the shop and having to pay to find out what is wrong. a little while ago my engine started making this massive rattling noise upon start up and yesterday while i was in the drive it started rattling after about 5 minutes. if this helps i did a tune up on the engine (2.5L) about 18 months ago. and starting in may i am going to do an upper intake cleaning ,buying a intake and doing antoher tune up with bosch sparkplugs and ford racing wires. (what size would be good and what type of sparkplug also. any help is appreciated.

Thanks Bryan