Thanks Bonespec,

But I have been trying to hook up the tach to that wire. Either I am not getting enough of a signal (or the wrong type of signal) off of that, or as I read somewhere, some of the Nissans use a low voltage signal that may be too low to trigger the tach. It's strange though I haven't been able to find anyone who's actually put in an aftermarket tach in a zx that has written, one way or another, anything about the process on the web.

Information super highway my ass! ha