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ethanolsupport [2014/03/12 09:01] twdorris [Calculating global fuel scale] |
ethanolsupport [2014/06/05 09:14] twdorris [Calculating global fuel scale] |
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- | The power connection (labeled "Vcc") needs to run to a +12v source. You can find +12v either straight off the battery (of course) or there's a +12v wire on the MAF connector harness too. This will be a thick red wire on pin 3 of a 1G MAF connector or pin 4 of a 2G/EVO3 MAF connector. | + | The power connection (labeled "Vcc") needs to run to a switched +12v source. You can find a convenient switched +12v source on the MAF connector harness. This will be a thick red wire on pin 3 of a 1G MAF connector or pin 4 of a 2G/EVO3 MAF connector. |
The signal wire (labeled "Out") needs to run to the ECU's MAF input. This is pin 2 (green with blue stripe) on a 1G MAF connector or pin 3 (blue with yellow stripe) on a 2G/EVO3 MAF connector. | The signal wire (labeled "Out") needs to run to the ECU's MAF input. This is pin 2 (green with blue stripe) on a 1G MAF connector or pin 3 (blue with yellow stripe) on a 2G/EVO3 MAF connector. | ||
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===== Operation ===== | ===== Operation ===== | ||
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- | **Example:**Current global fuel = -40.5% before installing the ethanol sensor. Once installed and the fuel pump is run for a few seconds, FlexFuelAdj reads +35.9%. | + | **Example:** Current global fuel = -40.5% before installing the ethanol sensor. Once installed and the fuel pump is run for a few seconds, FlexFuelAdj reads +35.9%. |
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**STEP 3: ** New global = 0.595 / 1.359 - 1\\ | **STEP 3: ** New global = 0.595 / 1.359 - 1\\ | ||
**STEP 4: ** New global = 0.438 - 1\\ | **STEP 4: ** New global = 0.438 - 1\\ | ||
- | **STEP 5: ** New global = 0.562 or **-56.2%** | + | **STEP 5: ** New global = -0.562 or **-56.2%** |
So you would change the -40.5% global fuel to -56.2% before enabling the ethanol sensor adjustment in ECMLink. | So you would change the -40.5% global fuel to -56.2% before enabling the ethanol sensor adjustment in ECMLink. | ||