where would i wire in the signal wire off the tacho in too?

I'm useing a standard loom, one of kevs.

need to know asap.

thanks inadvance.

you won't get the standard tacho to work with the CA tacho output I don't think.

The 12V feed to the coils (middle wire).

Using the old datsun spade terminals for such an important wire is not a good idea though. So you could try using a parallel wire to the 12V coils feed, or replace the terminals with a good insulated 2 wire connector.

for after market tachos, use the yellow wire with red stripe that goes to the dash loom.

ok i left a few things out in the 1st post.

its an after market tacho, 2nd i'm not running the silvia dash or dash wiring.

so do i just find the 12v feed in that main plug that goes to the coil packs?

NO, you need to find the yellow/red wire I spoke of.

PIN 7:

ok thanks, sorry just learning about all this ecu stuff.

In a funny voice...It's alllrigghht.

You could probably get some pulses off the 12V feed, but can't be sure. I recommend the factory ECU Tacho signal.

Good Luck