fuel pump low/high voltage transition table
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fuel pump low/high voltage transition table
I posted it in another thread, but its buried pretty deep, so I'm starting a new thread. I found the table that controls the transition between low and high voltage for the fuel pump. This will likely end up being very useful for the Walbro 400. So far, I've only found it for the 88590015 ROM as shown below. Post up requests for other ROMs, and I will dig them up as requested.
NOTE: This only works on factory fuel pump wiring or on a rewire that preserves a low/high voltage power arrangement such as:
https://www.evolutionm.net/forums/ev...e-circuit.html
January 14 Update
Someone asked if there was a hysteresis value. There is, but I had figured that nobody cared, so I previously omitted it. I have included it now.
Here is the entry for EvoScan to log the status:
88590015 ROM
NOTE: This only works on factory fuel pump wiring or on a rewire that preserves a low/high voltage power arrangement such as:
https://www.evolutionm.net/forums/ev...e-circuit.html
January 14 Update
Someone asked if there was a hysteresis value. There is, but I had figured that nobody cared, so I previously omitted it. I have included it now.
Here is the entry for EvoScan to log the status:
Code:
<DataListItem DataLog="Y" Color="" Display="Fuel Pump Low Voltage Status" LogReference="FuelPumpLowVoltageStatus" RequestID="9A" Eval="x bit 64" Unit="on/off" MetricEval="" MetricUnit="" ResponseBytes="1" GaugeMin="0" GaugeMax="1" ChartMin="0" ChartMax="1" ScalingFactor="1" Notes="" Priority="1" Visible="False" />
Code:
<table name="Min Load for Fuel Pump High Voltage" category="Fuel" address="3fce" type="2D" level="1" scaling="Load8"> <table name="Engine Speed" address="6b7a" type="Y Axis" elements="10" scaling="RPM"/> </table> <table name="Low/High Voltage Transition Hysteresis" category="Fuel" address="1674" type="1D" level="1" scaling="Load16"/>
Last edited by mrfred; Feb 2, 2012 at 08:58 AM.
88580014 ROM:
Code:
<table name="Min Load for Fuel Pump High Voltage" category="Fuel" address="3FF2" type="2D" level="1" scaling="Load8"> <table name="Engine Speed" address="6D56" type="Y Axis" elements="10" scaling="RPM"/> </table> <table name="Low/High Voltage Transition Hysteresis" category="Fuel" address="1674" type="1D" level="1" scaling="Load16"/>
Last edited by donner; Jan 15, 2012 at 09:37 AM.
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88840017
Code:
<table name="Min Load for Fuel Pump High Voltage" category="Fuel" address="3FF2" type="2D" level="1" scaling="Load8"> <table name="Engine Speed" address="6C82" type="Y Axis" elements="10" scaling="RPM"/> </table>
94170015:
Code:
<table name="Min Load for Fuel Pump High Voltage" category="Fuel" address="4556" type="2D" level="1" scaling="Load8">
<table name="Engine Speed" address="642E" type="Y Axis" elements="10" scaling="RPM"/>
</table>
<table name="Low/High Voltage Transition Hysteresis" category="Fuel" address="1A74" type="1D" level="1" scaling="Load16"/>
Last edited by donner; Jan 15, 2012 at 09:41 AM.
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96530006
Code:
<table name="Min Load for Fuel Pump High Voltage" category="Fuel" address="4568" type="2D" level="1" scaling="Load8"> <table name="Engine Speed" address="6576" type="Y Axis" elements="10" scaling="RPM"/> </table>
Last edited by Speedlimit; Sep 25, 2015 at 04:46 AM.
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This shows up in ECU Flash as Load "%." Is this "Load 1byte" or some other value?
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88570008
Code:
<table name="Min Load for Fuel Pump High Voltage" category="Fuel" address="39a4" type="2D" level="1" scaling="Load8"> <table name="Engine Speed" address="5c6e" type="Y Axis" elements="10" scaling="RPM"/> </table>
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