fuel pump wire with high/low voltage circuit

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Oct 19, 2016 | 01:30 PM

#211

dr_latino999

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From: Central TX

Quote:

Originally Posted by mrfred

January 6, 2012 Update:
Here is the table in the 88590015 ROM for controlling the low/high voltage crossover point:

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>

Does anyone have the code for controlling crossover for the 96530706 ROM?

Oct 19, 2016 | 08:24 PM

#212

CDrinkH2O

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From: San Francisco

Quote:

Originally Posted by dr_latino999

Does anyone have the code for controlling crossover for the 96530706 ROM?

Yes. Will post up when I get home.

Oct 20, 2016 | 12:17 AM

#213

dr_latino999

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From: Central TX

Quote:

Originally Posted by cdrinkh2o

Yes. Will post up when I get home.

Is it this block of code?

Quote:

Originally Posted by L-op

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

https://www.evolutionm.net/forums/ec...ml#post9891833

Oct 20, 2016 | 06:57 AM

#214

211Ratsbud

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From: Watertown, NY

Would someone be willing to make a harness and sell?

Would someone be willing to make a harness to sell? I sold my evo to a friend, I don't have time to do this kind of stuff. Or the general knowledge. Would prefer something high quality etc.. as much done cleanly as possible

Oct 20, 2016 | 09:34 AM

#215

mrfred

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From: Tri-Cities, WA // Portland, OR

Quote:

Originally Posted by 211ratsbud

I've talked with Matt@Spoolinup about selling a nice harness using the pressure switch method that is easiest to implement, but I don't think taken any action. I suggest that people send him emails letting him know that there is a market for this.

Oct 20, 2016 | 11:56 AM

#216

211Ratsbud

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From: Watertown, NY

Quote:

Originally Posted by mrfred

I'd particularly be interested in one that is ecu triggered. The car is using a vi-pec with much more flexibility.

Where in the car does the ecu signal for the high voltage relay "daylight"

Oct 20, 2016 | 12:09 PM

#217

211Ratsbud

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From: Watertown, NY

Quote:

Originally Posted by 211ratsbud

I'd particularly be interested in one that is ecu triggered. The car is using a vi-pec with much more flexibility.

Where in the car does the ecu signal for the high voltage relay "daylight"

Ohh.. didn't see the issue you had with the circuit @mrfred

Oct 20, 2016 | 12:12 PM

#218

Biggiesacks

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From: West Coast

Quote:

Originally Posted by 211ratsbud

Ohh.. didn't see the issue you had with the circuit @mrfred

thing is the ecu signal turns the relay off, which makes using it tricky, doable but tricky.

Oct 20, 2016 | 01:09 PM

#219

211Ratsbud

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From: Watertown, NY

Quote:

Originally Posted by Biggiesacks

thing is the ecu signal turns the relay off, which makes using it tricky, doable but tricky.

Ahh the perks of standalone

Last edited by 211Ratsbud; Oct 20, 2016 at 01:15 PM.

Oct 20, 2016 | 01:17 PM

#220

dr_latino999

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From: Central TX

Drove around for 80 miles today using the pump crossover code, I'm surprised I forgot to add it for 6 months. Worked as expected.

Oct 21, 2016 | 12:09 PM

#221

CDrinkH2O

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From: San Francisco

Quote:

Originally Posted by dr_latino999

Is it this block of code?

https://www.evolutionm.net/forums/ec...ml#post9891833

Yep that is it.

Jan 21, 2017 | 04:21 AM

#222

Installer88

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From: Kennesaw, GA

Has anyone reported backfeeding of power and the fuel pump running after the car is off with mrfred's hobbs switch wiring?

Jan 21, 2017 | 12:23 PM

#223

Raceghost

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From: Out West

MRFRED,

Hey, I am looking at doing a rewire, but in a little different fashion. I am looking to rewire the Hot lead from battery to Relay 3. This is the Hot lead, that once the Relay is activated, feeds the Hot lead to the Fuel Pump, which I believe is the White wire coming off of Relay 3. Question is, what is the HOT Wire to Relay 3 from Battery? Having issues reading the color code designations of the plug that connects to Relay 3.

Can you help? Anyone else know?

Jan 22, 2017 | 06:46 AM

#224

patkelley

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From: Grant, AL

Quote:

Originally Posted by Installer88

Has anyone reported backfeeding of power and the fuel pump running after the car is off with mrfred's hobbs switch wiring?

This setup with the hobbs switch and relay under the dash works perfect for me.

Jan 23, 2017 | 05:11 AM

#225

TrendSetter

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From: florduh

Quote:

Originally Posted by Raceghost

I think you may experience a minimal performance increase because the relay is on the firewall so you still have the stock wire going from the firewall to the pump. it will be interesting to see how well it works though.