What is a Map Sensor?

A manifold absolute pressure sensor (MAP) is one of the sensors used in an internal combustion engine’s electronic control system. Engines that use a MAP sensor are typically fuel injected. The manifold absolute pressure sensor provides instantaneous manifold pressure information to the engine’s electronic control unit (ECU). This is necessary to calculate air density and determine the engine’s air mass flow rate, which in turn is used to calculate the appropriate fuel flow. (See stoichiometry.)

How much Water is Used?

Very little. You could drive many weeks without having to add more. We advise to add distilled water once every week or two to ensure maximum gas production. If you drive the average of 2,000 miles per month, only 1 Gallon of distilled water, costing about $1 at grocery stores, is consumed in about 8 months (in a single cell system). If you want to make your own distilled water, units are out there for around $100, or you can find simple plans online to build one.

How Can I Measure the Exact Savings?

Digitally: 1) The most popular and precise option, simply mount a device called a Scan Gauge on your dash. This connects to the vehicle’s Onboard Diagnostic System and reports your mileage clearly! We offer these for $200 if you would like one. You can see this in action on the first Customer Experiences video. The only limitation is that the device will not work on vehicles older than 1996, so you will have to choose another option below.

2) There is also a device that connects to your Palm Pilot or Laptop and provides sophisticated diagnostic information. It is called Auterra Dyno-Scan, and has the advantage of keeping records of your performance, including horsepower, torque, gear ratios, top speeds, etc, and will map the information for you over time.

Manually: Online there are various free calculators that will do the math for you once you plug in the numbers.
This is accually fairly accurate:

1. Go to the gas station and fill up the fuel tank.
2. Record the mileage, before even pulling away from the pump. We will call this Mileage A.
3. Drive normally until the tank is less than half full.
4. Fill up the tank again (preferably at the same station using the same pump as pumps may be calibrated differently). This time, pay attention to how many gallons it takes to fill up the tank and record this number.
5. Record the mileage again, just like before. We will call this Mileage B.
6. Subtract Mileage A from Mileage B. This will give you the number of miles you drove since your last fill-up.
7. Divide your answer by the number of gallons it took to fill up your tank. This will give you your vehicle’s MPG.
8. Repeat this test again, this time with the Water Fuel System installed and operating.
9. To determine the percentage increase, divide this number by the your vehicle’s original MPG, subtract 1 and multiply by 100.

In Equation form:

Fuel Economy (MPG) = New odometer reading – Old odometer reading
Gallons of fuel to refill tank

MPG gain (in %) = New MPG x 100 -1
Original MPG


Every one or two months remove the HHO Generator from it’s holder and clean it with a toothbrush and tap water. Make sure that the engine is off and the Generator is cool before servicing. For extra safety, also remove the fuse to the battery connection before servicing.

Check the water level about every gas fill up, keep it about 1″- 1 1/2″ from the lid.You must also add a small amount of standard baking soda when you add more distilled water. This acts as an electrolyte, helping the reaction to occur optimally. You only need 2 teaspoons of this per 1 gallon of distilled water. Premix it and keep a jug in your trunk or garage.

Will the HHO injection Damage my Vehicle?

No way! It will improve the health of your engine by cleaning it every day. Unburnt fuel deposits that build up in your engine will be removed, reducing wear and tear and increasing performance. There will be no rust from the Hydroxygen. To power the device the battery and alternator are not overworked by any stretch of the imagination. The Water Fuel System requires a very small amount of energy to operate: 1-3 amps, much less than your car stereo! Dual Cells draw 2-4 amps, while 6 Cell Packs draw only 5-7 amps. A 15 amp fuse protects the setup from drawing too much power. ( THIS ANSWER IS FOR THE WATER4GAS TYPE UNITS) NOT A GIANT 12″ X 11″ TWENTY PLATE UNIT.


Emissions are largely the result of unburned fuel. Since more of the fuel is completely combusted, these are reduced, to the same degree that your mileage is increased. The result of splitting apart the water is water vapor and oxygen, two totally harmless substances that may actually help to clean the environment. This significant reduction in emissions will help to reduce the harmful effects of poisonous pollution and climate change.

Performance Increase & Changes in Operation?

With this System more of your primary fuel will be completely burned, smoothing out and improving overall operation. You will almost immediately notice a significant reduction in engine noise, as a more complete combustion helps the engine to cycle correctly. For a period of about one month the engine will continue to remove built up carbon deposits resulting from unburnt fuel, further increasing your performance & mileage and reducing your emissions. Your valves and pistons, etc, will be free to operate smoothly, thereby reducing wear and tear. The acceleration and horsepower will increase as the engine will be operating more efficiently. Be aware of this as you may not have to push the pedal as hard as usual to take off!


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s