On another subject, does anyone know how the diesel tachometer is wired? Right now, I have a C223 tach in the dash, connected to the factory wiring for the gas engine. I've tried connecting the tach wire to both of the terminals coming from a plug on the side of the inj. pump (which my information indicates should be the tach sender) but there's no action at the gauge.

I have not checked the wiring yet to see if there's an open or whether the gauge has power and ground. Assuming these things check out, what am I missing? Is the tach signal likely to be different between the C223 and 4JB1 engines, rendering my tach useless? Do I need to supply voltage to the tach sender to make it produce a signal (hence the 2 wires coming from it)?

Thanks guys.