STAFOR HHO MAF/MAP fully digital and automatic
enhancer (corrector).
Installation manual.
Version – 05.14.
HHO hydrogen on demand dual fuel systems
Ecologically clean – lowers CO and CO2 emissions
HHO hydrogen ģenerators for fuel saving
Ecologically clean – lowers CO and CO2 emissions
1
Introduction
The present MAF/MAP Sensor Enhancer is fully digital and after first regulation work in automatic mode. It is
designed to work together with STAFOR HHO PWM (Pulse Width Modulator), but can be connected to any other
HHO system. This device was designed to work with an HHO generator system (Hydrogen Fuel Cell) and should not
be installed isolated.
In this installation manual it is included detailed information regarding installation, regulation and maintenance
based on the tests made by our Team in a large number of vehicles.
Even if you have good mechanical skills, you should consult first a qualified mechanic before installing this device.
You should have with you the repair manual of your vehicle in order to help you find the MAF/MAP sensor and
locate the wire that goes from this sensor to the computer. Improper installation of this STAFOR HHO MAF/MAP
Sensor Enhancer may cause problems with your vehicle's electrical system.
Safety Precautions
Read and follow these safety precautions to avoid hazards. If you do not understand these instructions or do not
like to work on vehicles, please have a qualified mechanic do the installation for you. Incorrectly installing or using
the Hydrogen on Demand Dual Fuel Generator Systems may result in serious damage to you and/or your vehicle.
It should take approximately half an hour to install this unit, so ensure that you have enough time to complete the
installation. Be sure to work outside, no smoking at any time during the installation, make sure the engine is off
and very importantly, NOT HOT.
Be sure to wear goggles and rubber gloves and only use professional tools, use common sense and general safety
procedures used for any work carried out on automotive installations and maintenance.
Components
An Electronic Control Unit (ECU) controls the internal combustion operation of the engine. The simplest ECUs only
control the quantity of fuel injected into each cylinder per engine cycle. The more advanced ECUs also control the
ignition timing, variable valve timing (VVT), the level of boost maintained by the turbocharger, and other engine
peripherals.
ECUs determine the quantity of fuel, ignition timing, and other parameters by monitoring the engine through
sensors. In most cars and trucks the more important sensors are the MAP/MAF (airflow) and oxygen sensors.
For an engine with fuel injection, the ECU will set the quantity of fuel to inject based on a number of parameters.
For example: If the accelerator pedal is pressed further down, this will open the throttle body and allow more air
to be pulled into the engine. The ECU will inject more fuel according to how much air is passing into the engine.
A mass air flow sensor (MAP or MAF) is used to find out the mass of air entering a fuel-injected internal
combustion engine. The mass air flow information is the most important one and necessary for the engine control
unit (ECU) to balance and deliver the correct fuel mass to the engine.
How does the MAF/MAP Sensor Work?
HHO hydrogen ģenerators for fuel saving
Ecologically clean – lowers CO and CO2 emissions
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As mentioned before the Manifold Absolute Pressure (MAP) or the Mass Air Flow (MAF) are the two sensors
normally found in cars responsible for giving information to the computer (ECU - Environmental Control Unit)
regarding the quantity of air being aspirated by the engine and, in this way, be able to calculate the quantity of fuel
needed to be injected in order to maintain the predetermined air/fuel ratio. If more air is going into the engine
then more fuel will be injected in the engine and vice-versa.
The MAF/MAP sensor pick a 5 volt signal from the ECU, and returns a lower voltage signal in accordance with the
aspiration in the engine and the quantity of air going inside. A higher output voltage means more air passing,
which is then calculated as "more fuel is needed". Lower output signal indicates higher engine vacuum, which
requires less fuel.
It's not just fuel control. The MAF/MAP sensor signal gives the computer a dynamic indication of engine load. The
computer then uses this data to control not only fuel injection, but also gear shift and cylinder ignition timing.
STAFOR HHO MAF/MAP Enhancer
Digital STAFOR MAF/MAP Enhancer is a hi-end electronics development. After installed digital MAF/MAP enhancer
must be regulated only one time. After that enhancer automatically adjusts to car each time you start the engine.
Digital sensor adjusts correction of MAF/MAP sensor to your driving style in real time.
In difference of all other MAF/MAP enhancers for HHO generators with digital STAFOR HHO MAF/MAP enhancer
you will not feel loss of car power and it will not damage to your car’s engine.
The MAF/MAP is a small device normally installed in your intake manifold after the air filter box. It has normally 5
Volts coming in, and it simply senses the airflow in the manifold and attenuates (reduces, weakens) this incoming
voltage by a certain factor. In other words it reduces the supply voltage to a direct-current voltage in the range of
15% to 60% of the supply voltage (depending on the car's design these numbers will vary), and this varying (but
non-pulsing) signal is then sent back to the computer.
Our STAFOR HHO MAF/MAP sensor enhancer box simply takes this already attenuated (reduced, weakened) signal
and attenuates it further. In this way the ECU will think that less air is going inside the engine (although it is the
same in reality) and give order to inject less fuel. The loose of power is compensated by the injection of the HHO
gas by STAFOR HHO hydrogen generator kit or any other HHO system.
Principle of STAFOR HHO MAF/MAP enhancer work
Digital MAF/MAP enhancer will write in memory information about cars MAF/MAP sensor information at engines
idle state (working, but not driving). That information will be updated each time you start the engine, but only with
timeout in approximately 5-10 seconds. It is important as weather conditions, fuel quality can change. Green LED
will show that digital enhancer have written information at memory bank.
In further work there will be no corrections made to MAF/MAP signal when engine is at idle state, to avoid damage
of engine.
When car will start to drive, the MAF/MAP signal voltage will be reduced (attenuated). Maximal reduce
(attenuation) coefficient is 0.5 from original signal (according to post installation regulation).
HHO hydrogen ģenerators for fuel saving
Ecologically clean – lowers CO and CO2 emissions
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Post installation regulation must be done only one time. It can be done by the rotating clockwise and counter-
clockwise of the potentiometer (ADJ) on device. The idea is that turning potentiometer will "enhance" or "reduce"
the voltage.
Too much attenuation kills the engine, it will simply shut off. Yet if you control it correctly, you can lean down the
mixture from the balance of ingredients which is factory set at 14.7:1 (14.7 parts of air to 1 part gasoline) - down to
20:1, maybe even 50:1.
Without attenuation, that is when the ADJ potentiometer is set to end counter-clockwise, the air to fuel ratio will
be maintained at 14.7 parts air to 1 part fuel. When you begin to turn it, this ratio increases. If you turn the
regulator (ADJ) too far, the engine will shut down due to lack of fuel.
If you will need fast acceleration and accelerator will be pressed down STAFOR HHO digital MAF/MAP enhancer
will cancel all corrections and allow you to have acceleration you need. This happens because STAFOR HHO MAF /
MAP detects abrupt voltage rise in signal of air sensor when car is under hard acutely acceleration. Sensibility of
this fast voltage rise can be adjusted via potentiometer ADJ2. Actually using ADJ2 You can configure (install) the
maximum abrupt voltage rise at which STAFOR HHO MAF / MAP should cancel all corrections. When you finish a
sharp acceleration digital MAF / MAP amplifier will return to normal operation as power surge passes.
HHO hydrogen ģenerators for fuel saving
Ecologically clean – lowers CO and CO2 emissions
4
Installing and Tuning
Description of internal connections and regulators (potentiometers) inside STAFOR HHO MAF/MAP enhancer:
1. -IN contact terminal – input from STAFOR HHO PWM (or
input from battery (negative) if another HHO system used)
2. -OUT contact terminal – input from STAFOR HHO PWM (or
input from battery (negative) if another HHO system used)
3. +IN contact terminal – input from STAFOR HHO PWM (or input from battery (positive) if another HHO system used)
4. SEN contact terminal – input from MAF/MAP sensor signal
wire (app. 5V)
5. ECU contact terminal – output to cars ECU (corrected signal from MAF/MAP sensor)
6. MAF/MAP sensor signal reducing (attenuation) trimmer (potentiometer, regulator) – must be tuned only one time.
7. Green LED indicates that digital STAFOR HHO MAF/MAP
enhancer have written information in memory and working
properly
8. Potentiometer (trimmer) for setting sensibility of fast
(abrupt) acceleration of car (setting surge voltage value at
which the signal from MAF / MAP must not be corrected –
should be set once during the installation.
HHO hydrogen ģenerators for fuel saving
Ecologically clean – lowers CO and CO2 emissions
5
Please refer to the illustrations below for typical connection of the STAFOR HHO MAF/MAP Sensor Enhancer to
STAFOR HHO PWM (Pulse Width Modulator) or any other HHO system:
HHO hydrogen ģenerators for fuel saving
Ecologically clean – lowers CO and CO2 emissions
6
Locate the wires connected to the MAF/MAP sensor. The wire to cut will be the one where the voltage change
with the acceleration of the engine. If you cannot locate the sensor or the wires, or you're not sure, you'd better
get an auto-electrician to install it for you.
To find the MAP/MAF Sensor Signal Wire, use a Circuit Tester to find the correct wire. You can hook this tester in
series with your multi-meter to find the actual voltage of the wires coming out of the MAF/MAP Sensor. The
HHO hydrogen ģenerators for fuel saving
Ecologically clean – lowers CO and CO2 emissions
7
correct wire is the one with the lowest voltage or the one with a voltage that varies when the engine RPM is
increased.
Now cut the wire, and join the cables from the MAF/MAP enhancer like shown in the diagram above. The wire
from “ECU” contact goes to ECU, and the wire from “SEN” contact goes to MAP/MAF sensor. Put a short lengths of
“heat shrink” on cables, bare ends and twist connections together. Solder, then slip “heat shrink” back over joint
and gently apply heat to make water tight seal. Secure cables with cable ties.
Post Installation Tuning on the Road (only one time after installing)
Turn ADJ potentiometer all the way to the left. Turn ADJ2 potentiometer all the way to the right. Make sure your
HHO Generator is operational. Warm up the engine and drive a while before regulating ADJ potentiometer.
DO THE NEXT STEP WITH CARE - JUST IN CASE YOUR ENGINE STOPS UNEXPECTEDLY.
1. Now, start turning the potentiometer clockwise, the mixture will turn leaner and leaner until the car stalls
or bucks as you drive. Back the ADJ regulator off slightly after the bucking and chugging.
2. Keep the danger of overheating in mind. If your HHO Generator device is non-operational and STAFOR
HHO PWM is not working, digital MAF/MAP will not make any corrections to sensor signal.
3. Sharply press acceleration pedal till maximum (sharp peak acceleration). If you feel that the car
accelerates not enough quickly, gently turn the potentiometer ADJ2 counterclockwise. This way you
decrease maximum surge during hard acceleration of car.
4. Remember that reducing the maximum limit of a voltage surge during acceleration with ADJ2 to much,
can cause that STAFOR HHO MAF / MAP will not correct standard signal from airflow sensor. In this case,
please, again turn ADJ2 all the way to the right (clockwise) and start tuning from point 3.
NOTE: When this device turns on for the first time, sometimes the "check engine Light” comes on and this needs
resetting with a ScanGauge-II or an OBD-2 Connector (1996 cars or newer). When this has been done if your
connections are correct, it will stop off.
MAXIMIZE BENEFITS
You will get improved economy straight away but it is dependent on your HHO generator performance. The better
performance you get from this, the more lean your car, but don’t overwork the engine by leaning it too much -
play around until you find the PERFECT BALANCE point. The way you drive also has quite an influence, if you need
fast acceleration, you will not be able to “lean” it out as much, as driving normal.
Our STAFOR HHO MAF/MAP Enhancer is ideal for different driving styles, or types of driving. Fast and town or
normal and towing. Digital enhancer will automatically detect how you drive and make corrections in sensors
signal. All you will need to do is - tune it only one time after installing on car.
HHO hydrogen ģenerators for fuel saving
Ecologically clean – lowers CO and CO2 emissions
8
WARRANTY
Name Data Additional information
Model
Serial number
Car model
Engine, type/volume
Reg.number of car
Name, surname/Client
Client phone number
Date of installation
Installation made by
I have no claims and objections: (signature) (name, surname)
Installation made by: (signature) (name, surname)
Z.v.
HHO hydrogen ģenerators for fuel saving
Ecologically clean – lowers CO and CO2 emissions
9
STAFORHHO.com E-mail: [email protected]
Phone: +371 27124103 Phone: +371 28444384
Address: 45/47 Mukusalas street,
Riga, Latvia, LV1046
Fax: +371 67603399
