piggypen

I have a 97 civic with a b16a2 that has the most unusual problem. at no consisant point does this roblem occur accept for at 80 miles an hour or 4600 rpm in 5th. the motor will completely cut out. it feels like fuel cut. but nothing works. you have to let off and then get back on it before it will work agian. I was wondering if anyone else has had this problem and may know a solution. or if you have any suggestions please let me know.