Go to the original EA engine connector in the engine bay.
Tie the Purple(?)EJ wire into the Yellow/Green wire for Temp gauge. "T" in a resistor(270 ohm) and connect that to ground on the intake to correct the swing of the needle.
You can also tie the Green(?) wire into the Yellow/black wire for Oil Pressure. It will work backwards though.......when all is good, the gauge will be below zero. If the OP drops off, the needle will peg to maxed out.
(I may be confusing the EJ wire colors, but purple and green are the OP and TEMP wires from the EJ harness.....go by whatever we labeled them)
You will also want to ground out all most of the Black/red, Black/yellow, etc....wires at the EA engine connector......the Digidash and trip computers will need those wires to be grounded.
I remember the purple and green wires. I think I buried them in the loom because the labels came off. I think I found the Yellow/Green up on top in the wires that run along the top of the firewall. Yeah it seems I have some grounding to do. I get a bouncing tach(which I haven't hooked up yet BTW) when I use my turn signal. And my CEL from my EA is just barely illuminated for some reason. I haven't touched that either.