Difference between revisions of "Fuel Management"
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THE best outline about the fuel system can be found in the following | THE best outline about the fuel system can be found in the following | ||
[https://www.golfmk7.com/forums/index.php?threads/does-the-mqb-fuel-system-defy-physics-aka-why-do-i-need-a-huge-fuel-pump.367016/ thread]. | [https://www.golfmk7.com/forums/index.php?threads/does-the-mqb-fuel-system-defy-physics-aka-why-do-i-need-a-huge-fuel-pump.367016/ thread]. | ||
| + | |||
| + | == Flexfuel == | ||
| + | |||
| + | The ECU will do automatic mass fuel flow (mff) compensation based on ethanol content. It can do this both with a sensor or sensorless. | ||
| + | |||
| + | By default, the calibration is set up to leverage a "manual" ethanol setting (which is what the ED code short circuits for the slider). When configured in automatic mode, the ECU will use algorithmic based flex fuel adaptation. By enabling a sensor (pinned to pin 71 [need to verify]), the ecu will instead use the sensor unless the sensor fails. | ||
| + | |||
| + | <pre> | ||
| + | Switch to use manual alternative fuel ratio | ||
| + | lc_fac_afu_ratio_man_act - set to [00] to disable | ||
| + | |||
| + | Logical value to indicate AFU sensor configuration | ||
| + | lc_fac_afu_ratio_conf - set to [00] to enable the sensor (not a typo) | ||
| + | </pre> | ||
| + | |||
| + | It also might be helpful to enable the PID output for e-content (PID 52) | ||
| + | Details start on page 23709 of the FR. | ||
| + | c_state_srv_1_pid[n][10] is the bit field that includes pid 52. | ||
Revision as of 13:38, 22 December 2020
Fuel system basics
THE best outline about the fuel system can be found in the following thread.
Flexfuel
The ECU will do automatic mass fuel flow (mff) compensation based on ethanol content. It can do this both with a sensor or sensorless.
By default, the calibration is set up to leverage a "manual" ethanol setting (which is what the ED code short circuits for the slider). When configured in automatic mode, the ECU will use algorithmic based flex fuel adaptation. By enabling a sensor (pinned to pin 71 [need to verify]), the ecu will instead use the sensor unless the sensor fails.
Switch to use manual alternative fuel ratio lc_fac_afu_ratio_man_act - set to [00] to disable Logical value to indicate AFU sensor configuration lc_fac_afu_ratio_conf - set to [00] to enable the sensor (not a typo)
It also might be helpful to enable the PID output for e-content (PID 52) Details start on page 23709 of the FR. c_state_srv_1_pid[n][10] is the bit field that includes pid 52.
