by sfttailpaul on Sun May 24, 2009 1:05 pm
Both posts above me are at least two months old, and I noted that no one responded. Do you still need help? I would assume that by now, you have found your answers. If not, I'd be happy to help you if I can at all...
To those that are reading this and shaking their heads...
Many get confused about which sensor to work on, MAP or MAF. There is NOT a generic answer. Firstly, some manufacturers use MAP to alter the A/F trims. Some use the MAF; some use both. Starting in 2006, GM started using a frequency based MAP signal that is nearly impossible to manipulate. When one simply adds/subtracts voltage, it is a relatively simple process to "tune" the MAP sensor and add a few millivolts. But a frequency based signal, cannot be manipulated so easily. Why would they change their system to this? I believe that the automobile manufacturers are trying to thwart our efforts by doing things like this. They keep making it harder to get into their ECU and change things.
Any vehicle that is OBD-II will NOT accept this HHO gas (specifically the extra Oxygen), and will probably loose mileage as a result. The ECU has to be manipulated to "see" a rich condition and therefore retard the fuel to the engine. The new parameters that you must utilize have to remain within the original factory window set up in the ECU. Our Hydrogen is more than adequate to replace this fuel we cut back. A neat trick is to solder Capacitors across the Fuel Injectors wire leads. This will cut back the fuel by about 3-5%, giving you an instant 3 MPG gain. I used .1uF/600V Caps on my 2008 Chevrolet HHR 2.2Liter, 4 cyl poo-pooh engine.
The most important factor of installing a HAFC system (Hydrogen Assist Fuel Cell) is the tuning of the vehicle's ECU (where applicable). I care little about great gas production if I cannot keep the long-term gains.