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0-5V MAF Installation
Operation:
The 0 – 5 Volt MAF mode is designed for vehicles where MAF is used and the output of their
MAF sensor is 0-5V and not a frequency.
Dip Switch Settings:
VW/Audi 1.8T
Subaru WRX/STi
Nissan S13/S14/S15/300ZX
Setup, Connection:
To setup your system for MAF you must first find the correct source to connect too. In order to
locate the correct signal the use of a voltmeter will be required. Once you have located your
MAF sensor you can begin to check the wires for the “signal” wire. The signal wire should
remain at or near 0 Volts when the car is turned off or is not running. Once the vehicle is started
it should continue to remain at or near 0, however it may begin oscillate up and down slightly. To
determine if you do in fact have the correct wire you can try and rev the engine while monitoring
the voltage. If the signal rises and falls with the engine speed then you have likely identified the
correct wire. If you are experiencing difficulty locating the signal wire, refer to the vehicle’s
service manual to locate the MAF signal wire, and then try to verify again with a voltmeter. Once
you have found the correct signal wire you may tap onto and connect it to pin #11 (blue) of the
Water Methanol controller.
Testing:
To test your setup it is recommended you finish the installation, but before installing the nozzle
you run the engine and ensure the system is operating as expected. That is when the engine is
running and the MAF sensor is outputting in a range set by the controller you will get flow. You
want to ensure you are not getting flow when the engine is turned off or when it is not expected.
This could be due to improper wiring or having the incorrect mode selected.
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