fuel pump low/high voltage transition table

[Aurélien]

I've been founding the map posted by mrfred on evom about fuel pump low/high voltage transition table on evoVII VIII and IX EDM. Thanks mrfred very much !

This is a 2D load map that is RPM dependant.

88840017

<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>
<table name="Low/High Voltage Transition Hysteresis" category="Fuel" address="1674" type="1D" level="1" scaling="Load16"/>

96530006

<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>
<table name="Low/High Voltage Transition Hysteresis" category="Fuel" address="1A74" type="1D" level="1" scaling="Load16"/>

90550001

<table name="Min Load for Fuel Pump High Voltage" category="Fuel" address="438E" type="2D" level="1" scaling="Load8">
<table name="Engine Speed" address="4ca2" type="Y Axis" elements="10" scaling="RPM"/>
</table>
<table name="Low/High Voltage Transition Hysteresis" category="Fuel" address="1A72" type="1D" level="1" scaling="Load16"/>

88570008

<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>
<table name="Low/High Voltage Transition Hysteresis" category="Fuel" address="1674" type="1D" level="1" scaling="Load16"/>

[Lee5]

Looking good :)

Just had a look at the table for 0001, do you just set it 100% across the table and it will never drop the voltage ?

Lee

[Aurélien]

No i think you have to set it to zero.

100% means that you have to reach MORE than 100% relative engine load to activate high voltage.

The main idea of this function is to reduce the electrical consumption and the noise of the pump when you don't need lot of fuel flow. :smile:

[neilm]

going to pop it in to my xml now :smile:

so if you set it to zero the pump will get full power all the time ie 14.4 etc

would it be the same as hard wiring the pump ?

[Lee5]

No i think you have to set it to zero.

100% means that you have to reach MORE than 100% relative engine load to activate high voltage.

The main idea of this function is to reduce the electrical consumption and the noise of the pump when you don't need lot of fuel flow. :smile:


Cheers A, like I have said before you're a star, might be online later if I get time and we can have a chat :smile:


going to pop it in to my xml now :smile:

so if you set it to zero the pump will get full power all the time ie 14.4 etc

would it be the same as hard wiring the pump ?

I was thinking the same, all A needs to do is find out the address for 5/6 rom :lol:

Lee

[Aurélien]

Sorry mate i really have to work tonight..

I think this map is located @ 0x2580 in evo V ( MR4200403 )

Constant value of 80 ( unit8 ) axis is 0x1C506

Can you try to log it and confirm it switch from low to high voltage @ 50% load ?

MR4200403

<table name="Min Load for Fuel Pump High Voltage" category="Fuel" address="2580" type="2D" level="1" scaling="Load8">
<table name="Engine Speed" address="1C506" type="Y Axis" elements="10" scaling="RPM"/>
</table>

I don't know why ecuflash is adding 10000 to every adress for evo V xml ?
For example fuel map is said to be 118A7 while in fact it's located at 0x18A7...?

BTW that's all for tonight and probably all the week... :)

[Aurélien]

going to pop it in to my xml now :smile:

so if you set it to zero the pump will get full power all the time ie 14.4 etc

would it be the same as hard wiring the pump ?

Yep i guess.

[todd]

for 88570008 if you could please and thanks :smile:

[Lee5]

Sorry mate i really have to work tonight..

I think this map is located @ 0x2580 in evo V ( MR4200403 )

Constant value of 80 ( unit8 ) axis is 0x1C506

Can you try to log it and confirm it switch from low to high voltage @ 50% load ?

MR4200403

<table name="Min Load for Fuel Pump High Voltage" category="Fuel" address="2580" type="2D" level="1" scaling="Load8">
<table name="Engine Speed" address="1C506" type="Y Axis" elements="10" scaling="RPM"/>
</table>

I don't know why ecuflash is adding 10000 to every adress for evo V xml ?
For example fuel map is said to be 118A7 while in fact it's located at 0x18A7...?

BTW that's all for tonight and probably all the week... :)

Cheers mate, see you when you are about next but think of all the money you will earn :smile:

Lee

[Aurélien]

There you go todd

<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>

Mrfredd just updated the USDM rom with another hysteresis value for low/high fuel transition.

Now i've to look at these value for all the rom ... :p

[Aurélien]

Edited 1st post with hysteresis value.

[todd]

gentleman many thanks :smile:

[Aurélien]

Todd, you're welcome ! ;)

Updated MR4200403 too

<table name="Min Load for Fuel Pump High Voltage" category="Fuel" address="2580" type="2D" level="1" scaling="Load8">
<table name="Engine Speed" address="1C506" type="Y Axis" elements="10" scaling="RPM"/>
</table>
<table name="Low/High Voltage Transition Hysteresis" category="Fuel" address="D72" type="1D" level="1" scaling="Load16"/>


Note that the value for the hysteresis is the same on evo V to IX ! :smile:

[todd]

??? Being cheeky now but address for hysteresis for 88570008 :lol:

[Aurélien]

Added to 1st post cheeky mate ! :lol:

[todd]

Added to 1st post cheeky mate ! :lol:

:lol: purr fect

[Benny]

You legend A!

This should be perfect for the Walbro 400 to prevent over-run on stock reg.