la3 swap ?s

[turbotyler]

So i read most la3 swaps and havnt figured it out, does anyone know the pinout or is it the same for all la3s.

I have an 84 turbo gt doner, and puting in a 88 tc motor just fixed the oil return line and its ready to go in. it ran fine when they took it out at the JY. So on the la3 is the pinout the same as all mustangs or is it different since it is/was already a turbo 2.3 car.

Also looking for a diagram that shows where all the hoses connect on the firewall. I am talking about the long thing w/ the numbers on it that has lil rubber hoses connected.

Also any help on maybe what I should do to have this thing run great like cleaning and checking of things to make sure it runs well. I know there has to be like a ge it running right guide.but where to look I have no idea.

[Stinger]

There are two "sets" of ecu's that have interchangeable wiring: P series and L series. P series was came in your GT Turbo so it won't interchange with the L series without moving some pins.

rothfam.com/svo/reference/PEtoLA.pdf

It's called a vacuum tree and I don't know of any diagrams for it. You'll have to dig through pictures of 2.3T engines to get a pretty good idea.

To get it running good: Get it running, see what's not "good" about it, scan for codes, interpret codes, fix problems codes indicated, see if it's fixed now, if not then continue with diagnosis.

[turbotyler]

k, thanks

[merc460]

Here's a SVO vacuum tree
rothfam.com/svo/reference/svovacuum.pdf

[turbotyler]

AWESOME, thanks merc460

[oneowner88lx]

As for basic getting it running right clean out the EGR and Idle Air Controller if they are dirty. Follow the base idle set procedure that can be found on this site. Make sure base timing is at 10 BTDC.

[stanger]

Good day everyone. I recently purchased an LA3 to install in my SVO. My plan is to keep the car relatively stock with a few small modifications, such as: front mounted exchanger, adjustable boost gauge and larger exhaust.

I found the link to the website for repinning the computer and have some questions before I try this on my SVO:

1. on the bottom left of the first page, it shows a section to add wires. From what I have understand, the swap does not require these wires:

2 - BOO
3&6 VSS
25 ACT
52 & 55 EDF and HEDF (will require a separate fan system though)

My questions are:
30 - NI. It says to add it while it also says to move the pin. on both wiring diagrams, they show that both are NDS/NI. It also states on the misc info to tie 30 to 46 for a stick only. The wiring diagram on the SVO shows it as a ground, not to 46 signal return. In summary, do I ground it or do I tie into 46?
54 - WAC. It says to add it but both diagrams are shown with it in place on pin 54. Can someone explain why?

2. Under the move wires section, most are pretty clear with the exception of:

30 - 24, shown on all wiring diagrams. Further to that, the note on the right says to tie 24 to 46 (signal return) to make it always grounded, making it always premium fuel. Am I putting 30 to ground as shown above and tying in 24 to 46 or am I missing something.


Thanks in advance for your patience in responding to these questions

[Stinger]

Signal return is a ground, it's the ground circuit for all of the sensors. If you look at the diagrams, it shows all sensors connecting to pin 46.

Just do the "move wires" list and you're good to go. Don't overcomplicate it. You can add the ACT if you want, it's optional. Depends on your ability to add the bung/threads to add the sensor.

[stanger]

I hope I understand your response. Don’t worry about new wires, they are not required as I had suggested. Follow the move wires on the bottom and don’t worry about about the notes, move 30 to 24 only.

[Stinger]

You have to understand what you're doing with each move. When moving a pin from one location to the next (like 30 to 24), you're moving it from the pin # the SVO uses, to the pin # the TC uses for the same function (octane switch). These changes are just adapting the SVO pinout to the TC pinout.

The moves where it says to connect something to pin 46 (ground) is bypassing stock functionality (like the octane switch) and forcing it to be stuck in a certain mode (premium fuel mode in this case) or bypassing functionality (grounding neutral drive switch pin). Since your SVO already has an octane switch, it would be silly to remove its functionality.