hey guys i know this is a kinda newb question but what exactly is a variable resistor and what is it used for in na's. i have a grounding issue i believe might be on the motor? my lights and cluster dim and idle drops a bit. i dont have one on mine but all my emmisions are gone didnt know if this might be the cause

 

The variable resistor enrichens or leans out your idle air mixture.

That's it!

 

this should help you:
http://www.aaroncake.net/RX-7/grounding.htm