Originally Posted by
fu89
Hey guys, I recently decided to go for a negative pressure (vacuum) setup on my '06 Toyota Tacoma 4.0L. It seems as if all the rules change once you put your ordinary HHO system under vacuum; I was running a 10 plate setup with 1/4 tsp of baking soda in 1/2 gallon of tap water when I was running as a pressure system and once I hooked it up to my vacuum line everything changed. I blew about 4 30amp fuses until I removed 7 of my plates but the kicker is, now I have three 4.5 X 4.5 plates (2 gang SS blank light switch plates) and 1 1/4 tsp of baking soda and the unit stays cold and I'm producing enough HHO to get water from my tailpipe. The unit bubbles with a fury and does not seem to get hot, even after a 70 mile trip. Theres a hitch though, I'm not really seeing much gain and I'm not sure if I have the AFR O2 sensors in this truck. I know I'm producing HHO because at idle, after about 5 minutes I start getting smoke from the exhaust which tells me that the O2 sensors are sending a lean indication to my computer which in turn richens my mixture. Has anyone else tried this type of system and do you have any ideas on why I'm not getting mpg gains?