Questions Regarding 3T-GTE into TA22...

[toyo-al]

Hey,

I've recently purchased a 3T-GTE to put into my TA22, as some of you may already know! I might add this is the first engine conversion I've ever attempted and my first time re-wiring an engine.

It came with a complete loom that's a bit of a mess, missing plugs, spliced and diced, but I'm sure it's salvageable. It includes the knock ECU and the fuel ECU, and both harnesses to match.

I really want to learn how to do this, and I've got the wiring diagrams for the 3T-GTE that were floating around the internet, though I have NO idea what more than half the things on it mean/are..

What is the best way to re-wire the engine and ignition?

Are there certain components that I should wire up first?

I have the complete wiring loom behind the dash still in the TA22. Do I chop the main plug for that and start from there?

Or do I wire what I can up to the engine, plug in the plugs etc, put the ECU's into the car, then splice it into the ignition?

Would it be best to pull the dash loom out and re-do the whole thing?

I've got 101 questions for anyone who has time!

Alternatively, is there anyone in Newcastle who has done this before and would care to show me a thing or two, in exchange for some cold beer/money??

Cheers,
Al

[Radar]

If I were you I'd just run new wires from each sensor and just connect them to the ECU...
Theres only really the IAT(air temp), AFM(air flow meter), CTS(coolant temp), Injectors and knock sensor... You'll be surprized how simple it really is... Your best would be to just run all the wiring from the motor into the cabin, then wire into the plug of the ecu... Remember the signal wires for the injectors are for the neg terminal.. Group the power wires for the injectors and run them from a a relay that is only on when the ign is switched...
Don't forget to put fuses in as well..

[toyo-al]

Sounds so simple, and it probably is! It's just so intimidating when there is hundreds of wires going all over the joint!

Where does the knock sensor live? What about exhaust O2 sensor? What kind of wire is best of this? Then there's all the grounds? Then the wires to the battery. I honestly have no experience with this haha

I think I need to do some more research and see how it all works. Do all sensors have a ground? Does this ground usually run from the ECU? I'll get some pictures of my confusion and post them up...

Thanks Radar!

[MWP]

You are in for a world of pain using a loom that has been modified.
Even someone with lots of experience would take a long time to work it out.

Can you find an un-altered 3T loom anywhere?
(long shot i know)

[toyo-al]

I would like to make my own loom up, and I'm not in any real serious rush so I have a bit of time to get it right. It would really help having someone who knows what they are doing near by!

Also, the coils and igniter(s)? How are they setup? Do I need 2 coils?

Also, the vacuum lines - I have no idea where these all go either!! Anyone have a diagram?

[Radar]

Group all your grounds from the sensors and I have no idea if the ECU has a sensor ground wire but if it doesnt just ground them to the engine... Ground your ecu to the engine as well...
Use 3mm for your wiring and 4mm for earth... Might be overkill but what the hey..
The knock sensor should be above the oil pressure sender on the side of the Block I think don't quote me on that....
the 02 sensor goes in the exhaust you'll have to get a bung welded in, so you can screw the sensor in... either cyl 1 pipe or at the collector..

[Invid]

Although it's not a 3T this may help from when I put my 2TGEU into my 22.

http://khi-santh.canberracelica.org/...ta22-2tgeu.pdf
Most of your sensors and other wiring will go to the ECU. The only things you will need to splice into your TA22 loom is some ignition and power lines (and maybe a few other 3T-ish stuff that I don't know about).

Hope that help somehow.

[toyo-al]

Thanks for your help guys!

I'm going to sit down when I have more time and make a new loom up. Can't be too hard

Cheers,
Al

[3jcelica]

The standard gear ignition is completely seperate to the efi computer bar a taco signal. Wiring for the ignition is as below. Fairly straight forward. Obviously this doeS not include the knock computer, but I would not bother with it myself and if you do want it you can add it latter.

Ignitor wiring

Ok with the ignitor.

-The wire with the clamped conection (ring) goes to the positive (ignition feed) (brown I belive)

-The two black wires one to each coil negative. (doesn't matter which one)

-The dizzy (reluctance) wires are self explanatory and should plug into the dizzy

- run +ve ignition feed to each coil (and to the ignitor see first point)

-ve from one of the coils needs to go back to the ECU you could potentialy use the yellow wire here from the ignitor however I just run it to the -ve coil.


AS far as the fuel computer goes:

Injectors: injectos have an earth and power, it doesn't matter which terminal. So wire power to each through a relay that switches with the ignition. The other connection are earth, the computer fires in batches of two so wire two injector earths together and then back to the computer (should have two injector earths at the computer).

Sensor: wire each sensor back to the computer and earths (these may be terminated with the computer earths) The hardest sensor to wire is the Air Flow Meter use the pinout on the wiring diagram (pinouts of AFM are on the diagram also)

Fuel pump: needs to use an open circuit relay, use the original 3tgte if possible this relay needs to trigger when the AFM flap moves (good test is to push the flap and see if fuel pump runs, and when the cranking signal is active (the wire that goes to the starter motor (generally black and white) needs to wire into this)

The 3tgte computer has a speed cut and an over boost cut and a fuel enrichment cut, these are generally run of pressure switches. If you have no pressure switches you need to earth these inputs, you don't really want the speed cut and boost cut anyway but the fueling will result in a richer mixture during time when you are under ~4psi boost.

Really it is not that difficult

Roger

[Dale]

Are you still living at the same place Alex? I'll drop round one day and have a look at it all with you

[toyo-al]

Man, that would be awesome!! I'm still at the same place! You still haven't really seen the TA22 yet huh...

Any help would be really appreciated Dale

[Dale]

The glimpse of it out the window at your work doesn't really count haha

I should be free one day on the weekend, I'll text you to let you know... is your number still the same?

[toyo-al]

Yeah mate, still the same number. I'll be free all day Sunday! If you are free give me a buzz!