HHO for my Hyundai's
 

I have 2 Hyundai and I'm new to the HHO tech so what i need to know is for my 2003 santa fe 2.7. What enhansor do i need to build or purchase to run HHO gas. I tried to locate the map sensor but failed on both cars. I have located MAF and throtle position sensor as well as a air temp sensor on the 2.7.

From everything I've read most cars require an EFIE for the 02 sensor so you can lean the a/f mixture. I think that usually takes care of any associated problems.