Hi all my 01 supercrew with a 4.6 just started stalling and shaking really bad. its not driveable. i went through the car wash this morning and it was fine now on the way home all this started. i pulled 2 cops and looked at the boots and they were dry. should i check more or is it something else? thanks for any help

 

shaking, shuddering, and stalling....definately sounds like a COP to me. But I would recommend the usually stuff first:

Make sure your battery terminals are clean, and connected tightly.
Check for blown fuses,
check all fluids,

Sounds like a bad COP to me but sometimes it won't throw a CEL so diagnosing it electronically could be a pain (to see which cylider(s) is misfiring), how many miles on your 4.6L? Might be time for a tune-up.