Wiring my tach. Need Help!

Everything is hooked up. My tach lights up and everything, but I dont know which color wire on the computer I should hook the black wire up to. And where under my hood specifically is the main computer?

If you mean the ecu.. it's under the front console (behind the stereo in a 2g). And make sure you post in the right subforum. You could always splice the wire going to the current tach (I assume)

I also have no clue what car you have. Put that in your signature. Read the faq's at the top for other rules. Welcome to the boards. Hope you find what you need.

If its a 2G non turbo, the ECU is in the engine compartment. It's on the driver side right behind the fuse box. The wire is a solid white wire that you just tap into.