DC2000 – Installation Manual 24
HHO Plus, Alternative Energies, Lta – Travessa das Serras 33, Vieira de Leiria, Portugal – Tel. 00351244697116 – Email: info@hhhoplusgas.com
because the ECU has not been reset for higher octane. Thus even though higher octane is in actual use, the
data in ECU memory still corresponds to that of lower octane. This mismatch affects performance, as you are
unable to derive the benefits of boosting the octane. Therefore you should reset your ECU periodically after
filling up full tank in order to ensure that ECU adjustments for its octane memory are made afresh
corresponding to the octane actually in use.
Option 1
To reset the ECU you simply have to unplug the negative battery cable connection. Theoretically it is best to
leave it in this disconnected condition for as long as you can. Practically leaving it disconnected overnight is
more than enough. After having left the cable disconnected for sufficient time you have to connect back the
cable. Start the car and keep it running so that it warms up. This would not take more than 10 minutes at the
most in summers. Once you have done this you have accomplished the ECU resetting. Shut off the engine.
You can now use your car whenever you feel like. ECU resetting is over.
Option 2
You may also reset the ECU by simply unpluging both the negative and positive battery cable connections
and after connect them both together. Leave them connected around 40 minutes and then connect back the
cables to the battery. Start the car and keep it running so that it warms up. This would not take more than 10
minutes at the most in summers. Once you have done this you have accomplished the ECU resetting. Shut off
the engine. You can now use your car whenever you feel like. ECU resetting is over.
Installing the lambda sensor extender – Pre-Cat Sensor
Lambda sensor extenders are used in conjunction with HHO systems. In this type of system the extenders
effects a correction voltage back to the vehicle ECU, so that the ECU does not deliver excess fuel to the
engine as it tries to compensate for the increase of oxygen in the exhaust - which is a result of burning clean
fuels, such as hydrogen.
In practice, this extender stands-off the Lambda sensor from its normal position making the sensor less
sensitive to the increased level of oxygen in the exhaust that results from the burning of supplemental (HHO)
gas. Only first lambda sensors located between the engine and the first catalytic converter, in each exhaust
pipe, needs to be fitted with an extender.
Each Lambda sensor upstream of the catalyzer needs to be mounted on an extender as shown here.
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