In response to syncope:
I agree with the others on finding a decent neurologist. for starters. Add a cardiologist also.
I would have to say a holter monitor may be useful, but not necessary. Although you seem to think that he had an IR heartbeat and pulse at some point, it doesn't explain the fever.
The brain is pretty complex, and a CT only shows physical defects. The biggest problem with this situation, is getting it to occur with a neurologist present.
An EEG may not show anything, unless the event occurs.
There are two things to consider -
1) Some individuals will develop a fever, during and/or after a seizure.
2) Although febrile seizures usually only happen to children < 10yrs old, I wouldn't count that out either. Which leads to the question? Does the fever or seizure come first? Most likely the seizure.
3) Does he know when it's coming? Epileptics usually have an aura, or sense when a seizure is going to start.
I would have to agree, that this could be some type of seizure. You said his eyes were open, but he wasn't there. This mimics post-ictal activity that seizure patients have s/p seizure. I would find a neurologist that is interested in helping you. You need to squeak loud!
Just for the record, I had a friends son as a patient, that had a similar, one time event. He was fine, and talking to his friends one minute. He went out on them, became confused, and after was conscious, but nobody was home. He also had a fever during and after this episode. They did blood tests, MRI, CT, EEG, Drug screening, etc. Everything they could think of, and found no answer. Unfortunately, he was left with a permanent disability. His gait has been hampered slightly. However, more extensively, he cannot play sports anymore d/t this ? that occurred.