If I put an HHO generator into my 2002 explorer, I will have to either use an O2 extender or EFIE chip. Which one of these would be better to use as far as my engine? I don't want to cause any damage to my engine so I'm not sure which one I should use to prevent this. Thanks.
Thermo1.com and savefuel.ca you do not have to use either of them as you are producing a minimal amount of gas to provide better burning. If you have a lot of production then it may cause some problems.Perhaps you should try it out without and see if your mileage goes down which would be a good indicator of the need for the EFIE / extender.