How do you replace the RPM sensor on a 1993 Honda Civic?

Answer 1

I believe the 93 civic doesn't use a rpm sensor. I have the same car, and if you look closely, the blue wire on the distributer power cable supply's the tachometer with it's reading.

For example: i used a after market Tach on my 91 civic and 82 F150. The civic called for the blue and black pair coupler on the distributer. I wired up the signal wire from the Tach to that blue wire and presto, it worked. The F150 was similar. I wired up the Tach signal wire to the trucks coil(in this case the wire was green) and presto, it worked.

So try tracing your wires to make sure there aren't any breaks. If everything checks out, you might need to replace the tachometer on your dash panel. i believe the sensor is built it, only the wires run to it.

Hope this helps!