44 lines
1.3 KiB
Markdown
44 lines
1.3 KiB
Markdown
# Flex Fuel
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## Sensor and Wiring
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The following Sensors are known to work
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GM part numbers
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13577379 - SENSOR (short tube)
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13577394 - SENSOR (long tube)
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13352241 - HARNESS
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The Pinout is shown below
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## Sensor Setup
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Connect your sensor to a digital input on the ECU. Then, pick the pin in TunerStudio at `Sensors -> Misc sensors -> Flex fuel sensor`.
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(technical details - we expect a pull-up on the ECU, about 3K, somewhere 1K to 5K)
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## Fueling Setup
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In `Fuel -> Injection Configuration`, configure `Stoichiometric ratio` and `E100 stoichiometric ratio`. Unless you're doing something very weird, 14.7 and 9.0 are the correct values respectively (pure gas has a stoichiometric ratio of 14.7:1, and pure ethanol 9.0:1).
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That's it! The firmware will now automatically vary the fuel's stoichiometric ratio based on ethanol content.
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**It's recommended to switch to lambda mode (`File -> Vehicle Projects -> Project Properties -> Settings -> Lambda Display`), as the target lambda table is multiplied by the current stoichiometric ratio to get the target air/fuel ratio.**
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## Ignition Timing
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Coming soon...
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## Boost Control
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Coming soon...
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