After having the ICM and the actual tach replaced, and a bunch of head scratching, a Honda tech said " oh, that's the Ignition Coil". So, after the coil was replaced it has been fine. It wasn't the speed sensor, it was the IC. Luckily the ICM module and other crap was under warranty, as well as the IC. What got me was the timing belt at 79K. So, if anyone else ever has this happen, start at the Ignition Coil in the distributor.