Another Question about the Northstar

[Mark Romans]

Use a tech2 or diacom to look at if torque management is being used.
Northstars don't have a lot of torque.
Mark
-----Original Message-----
From: Roger Heflin <rah at horizon.hit.net>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Monday, April 12, 1999 6:58 AM
Subject: Re: Another Question about the Northstar


>
>
>On Sun, 11 Apr 1999, Chris Moore wrote:
>
>> Hi everyone,
>>   I think you all know the problem I was having.  But for those who
>> don't, My wheels will not peel out.  I have a power problem in the
>> low end.  Again I think it has to do with the Torque Management
>> system on the 4.6 Northstar.  I was looking into just making a pulse
>> generator to produce a wheel speed signal and run it into the brake
>> module.  But I was thinking.  The Northstar has two wires that run
>> into the PCM from the EBTCM(Electronic Brake Traction Control Module)
>> that have to do with the controling of the Torque Management.  The
>> first wire is Delivered Torque and the second wire is Desired Torque
>> Output.  These are the wires that let the PCM know how many injectors
>> to shut down and how much timing to retard.  It is read by a scanner
>> by percentage.0% to 100%.  Now, common sense tells me that one of the
>> wires are a power wire and one is a ground or a return.  Is there any
>> way that I could run the correct voltage to the PCM that will say
>> that there is 0% of Torque Management and that would do away with the
>> EBTCM all together.  With that being done, that would save me all the
>> hassles of trying to fool the EBTCM.  There are other variables to
>> that we would have to try to fool like the RPM, VSS, Throttle
>> position.  If we could just figure out how much voltage to send than
>> we could just get rid of the EBTCM and all the other variables would
>> not matter.  I hope someone can help me.  Thanks everyone for the
>> help.
>>
>> Chris Moore
>
>Probably the best way to figure out what needs to be input is to find
>a helm manual for the car you got the engine from.  The mhelm I have
>for my car hass quite a bit of detail on the wiring and what sort of
>signals and ranges are supposed to be on those wires.  If the wires
>are "delivered torque" and "desired torque" then making sure the
>"desired torque" is a higher value than the "delivered torque" would
>probably make everything work correctly.   And assuming (dangerous)
>that the input signals are both 5V, rig a voltage divider and give the
>"desired torque" a bit higher value than the delievered torque, and
>the computer should no longer back things off.   The sure way to know
>though would be to find/borrow a copy of the helm for that car and
>study the section on the traction control system.
>
> Roger
>