In prereration for HHO installation I modified my intake. I have a 1999 Toyota 4Runner 3.4L. I can route the HHO into the intake either before the MAF sensor or after it. It occurred to me though that the MAF sensor contains a glowing red hot wire. As the air is passed over the sensor the amount of current it takes to keep it at a constant temp tells the computer how much air the car is consuming. Routing the HHO after the sensor will not provide an accurate air intake reading to the computer while routing it before the sensor seems like it could create an explosion hazard, especially as the HHO content in the air increases, for instance during idle. Has anyone had an issue with the MAF sensor igniting their HHO? Any input would be very much appreciated.