Injector Resistor Pack need help ASAP

[94Talon2]

So for the injector resistor pack, do I cut The Main ground wire and the ground

wires attatched to each injector, then reattatch the ground wires to the resistor pack?

or do I splice the injector pack into the into each injector ground wire?

thanks,

 

[steve]

I don't know how most people handle the resistor pack on NT upgrades, but the resistor pack on turbo cars is installed on the power side of the injectors and the ECU outputs are connected to the ground side. If you install the resistors in the ground side it should work but you never see that side drop to 0v because the resistor will form a voltage divider with the injector.

Steve

 

[94Talon2]

thanks, but i'm still not sure how to wire it.

 

[steve]

OK,

Each injector has two wires to it. One is the power feed (pin 1) and one goes to ECU (pin 2). The power wires for injectors 1-4 are: Yellow/Black, Yellow/Red, Yellow/Green, and Yellow/White. The ECU wires are: Yellow/Blue, Yellow/Black, Lt Green, and Lt Green/White.

Follow the injector power wires back to where they join the Yellow/White from injector 4. That's your common point in the power circuit and after that point the Yellow/White is your common power feed. This is where electrically you wire the resistor pack in.

The resistor pack has a six pin connector, pin 3 (top right) is the common (power feed) for all the resistors, on a turbo car pin 1 is power for injector 1, pin 4 injector 2, pin 5 injector 3, pin 6 injector 4 but as long as you get the common right you can use whatever pins (1, 4-6) you want on the resistor pack.

Follow me so far?

If need be (since I don't know where the three other wires branch off the Yellow/White that runs to injector 4) extend all four injector power wires back to where ever you going to mount the resistor pack. (yellow 18 guage stranded would be a good choice) The factory mounting on the firewall helps serve as a heatsink for it.

Don't do anything with the ECU wires. They aren't really ground, they float until the ECU pulls it to ground to fire the injector.

Some getto installations will just have the resistors pulled out of the pack and soldered in each of the power feed wires.

Does that help?

Steve

 

[94Talon2]

Thats great thanks a lot,


So I cut each power wire from the common power feed wire?
then I conect the resistor power feed wire to the common power feed wire,
then conect the 4 other resistor wires to each injector power wire?

Thanks,

 

[steve]

Not having done this myself, I think that would be the way. It would then mirror the way the Turbo cars are wired.

Steve

 

[94Talon2]

Steve, thanks for all your help.

 

[94Talon2]

Anyone know where the injector power wires conect to the main power wire?
Iv'e gone through 2 feet of the wire harness, and they don't conect anywhere.

 

[steve]

All four wires go at least 2 feet? Thats actually good news.
I was worried that it was like a NA 3S where the three other injector wires merge with the fourth on the manifold. It would be nice if they ran to where the resistor would be on a turbo.

Steve

 

[94Talon2]

can't I just cut the four injector wires then, conect the four feed wires to the white resistor wire and the conect the four black wires to each injector?

 

[mavisky]

here i e-mailed you this as well. this is how i had it on my old wiring harness. all my cutting was done right near the injectors

 

[94Talon2]

Sorry, I must be slow.
I understand that I conect 4 black resistor wires to the 4 injector power feed wires. As for the white resistor wire I conect it to the 4th injector wire and don't use the other 3?

i'll make a diagram of what I have I don't really understand that diagram, and what does hot wire mean?

thanks

 

[steve]

Mav's diagram says to disconnect the existing power wires from your injectors. Run new wires for each injectors power to a black wire on the resistor pack. Last, run a wire from any of the old power feeds to the white wire on the resistor pack to provide it power.

It does the same thing as what we've been discussing. I was just trying to find the spot where the three wires from injectors 123 joined the wire from injector 4 to save a little wiring.

Steve

 

[94Talon2]

Ok great that's the way I did it, I just wasn't sure if I only conected one of the old wires to the white resistor wire, I guess It wouldn't really make a difference.