98 5.7 vortec swap to LM7 5.3l need wiring help

[shmiet]

Sweet build man. Freaking clean. So did you get rid of the black box or did you run them together?

[RPM Graphics]

thanks man. i'm only running the LS ECU. i don't have ABS or Neutral safety switch & without the NSS my gear indicator lights don't work & reverse lights don't work. i'll figure that out eventually.

[shmiet]

Thanks for all the good info. I noticed that you were looking at the weather sea,l with all the wires going through it. DId you have to remove any of the wires from that? I have got around to ripping the harness out yet. And did you swap the brake, check engine, and fuel pump wires from the old ecu to the new harness? And the 896 pcm will work right?

[Mickeymotormount]

Try this link for the coolant temp sensor:

http://www.impalassforum.com/vBullet....php?p=2667060

[RPM Graphics]

Thanks for all the good info. I noticed that you were looking at the weather sea,l with all the wires going through it. DId you have to remove any of the wires from that? I have got around to ripping the harness out yet. And did you swap the brake, check engine, and fuel pump wires from the old ecu to the new harness? And the 896 pcm will work right?

i didn't do anything to the brake wires. the new harness from Nelson came with an OBD2 port & light. i just tapped into the factory CEL so i have the one in the gauges & one under the hood. fuel pump just needed 12 volts that comes from the new harness.

i think i removed most of the wires on the passenger side plug. that plug is a little different on the 97/97 then the 96. that's how i realized i had the wrong year harness at first.

[shmiet]

Would you say it's easier to use both computers? that way i wont have to mess with the wires going into the cab etc correct?

[RPM Graphics]

i don't think so.

[shmiet]

I think I'm in way way over my head haha.

[shmiet]

Thanks, im definitely going to do that.