Engine Loom(S)

[TOMsGPTurbo]

Hey guys

Background:

My Rolla II GP Turbo had a 4EFTE (Starlet GT) engine slotted in by some dodgy mechanics around 7years ago, not even a month later the car was undriveable due to numerous issues which I couldn't address at the time, so it was put into storage. Recently a fellow rollaclub member gave me a car like mine with the same engine transplant for me to use as a parts car so I could get my car going again.

Main Issue:

During the engine swap 7 years ago the #&*@ stupid &@$!% mechanic didn't change the ECU over, so my 4EFTE (1.3ltr, 16v DOHC Turbo) was running an ECU designed for a 3ETE (1.5ltr, 12v SOHC Turbo engine).

The Situation,

Thinking the problem was just a simple(?) engine loom swap, I pulled the loom out of the parts car and I was going to plug it upto my engine, connect the ECU and job done.

However! my engine has a lot more stuff connected then the parts car did, and when I was sitting in my engine bay tonight, it didn't feel right pulling the loom out.

 

After closer inspection of the loom that's in the GP, it looks like the #&*@ stupid &@$!% mechanic did splice it, but I have no idea what he did, however I do have a 4EFTE and 3ETE loom diagram so I could work it out.

 

Would you:

a), Attempt to splice the current loom yourself to accommodate the 4EFTE ECU, or

b), Unplug the current spliced 3ETE loom and replug the 4EFTE loom.

 

Thank you,

Tom.

 

P.S: I know what I'm leaning towards, but I rather see what you say as my experience on working on cars is next to nothing.

 

Attachments - Spliced loom pics:

Note: Blue electrical tape

Edited October 5, 2011 by TOMsGPTurbo

[carbonboy]

:blinks: :hmm: :bash:

 

That's a real noodle scratcher...if it were me, I'd have a crack at splicing the 4efte ecu into your 3ete loom. If you can identify which wire goes to what & there's enough pinouts for the essentials plus the extra stuff your current engine has (a/c, p/s etc?) you should not only be able to get it in & running, but possibly even correct some of the previous electrical work while your're at it. :)

 

At first I thought to just put the 4efte loom in, as the ecu will work with it. Then I wondered how complicated it would be to integrate the extras you have into the loom. Not being an electrical guru, I'd say possibly very!

 

Good luck with whichever path you take!

Edited October 7, 2011 by carbonboy

[TOMsGPTurbo]

Cabonboy, that's the other route i was thinking of lol, not my first choice as I don't have all the electrical doobie wackers needed to complete the job.

 

Stupid question, is this how engine wiring works?

 

ECU is plugged into the engine loom, engine loom is plugged into engine sensors and battery, (don't touch anything else), end of story? car should technically fire up?

 

What would be all the other extra's besides power steering (I thought that would be aux.)? hmmmm I might have to strip out the other extra's from the parts car and swap them other.... hmmm I'm just going to have a crack at it and see what happens...

Edited October 8, 2011 by TOMsGPTurbo

[Medicine_Man]

where are you living these days? should drop round for a look see..

[TOMsGPTurbo]

PM Sent!

 

Can you do me a favour and move my thread to the electrical forum, I didn't see it :blush:

lol

 

 

[carbonboy]

However! my engine has a lot more stuff connected then the parts car did, and when I was sitting in my engine bay tonight, it didn't feel right pulling the loom out.

 

^^^ I think I have misinterpreted this part, sorry for the confusion. :blush:

 

Cabonboy, that's the other route i was thinking of lol, not my first choice as I don't have all the electrical doobie wackers needed to complete the job.

 

Stupid question, is this how engine wiring works?

 

ECU is plugged into the engine loom, engine loom is plugged into engine sensors and battery, (don't touch anything else), end of story? car should technically fire up?

 

What would be all the other extra's besides power steering (I thought that would be aux.)? hmmmm I might have to strip out the other extra's from the parts car and swap them other.... hmmm I'm just going to have a crack at it and see what happens...

 

I wish I could answer that, seeing as my electrical experience extends as far as how-not-to electrocute myself/set things on fire, any answer I could give would be completely guesswork I'm afraid. :( Hopefully Mr Medicine Man has your remedy! :y:

[TOMsGPTurbo]

Hmmmm before I saw Justin's post I disconnected and removed the whole 3ETE engine loom :P

Thank you for your input Carbonboy! I really appreciate it :y:

 

 

[ninja-philbo]

man take everything out of the parts car body loom aswell and put it in urs ditch the crappy wiring job start with a working setup that way u wont be scratching ur head if something doesnt work

that is if the parts car started and ran no dramas.

[TOMsGPTurbo]

Parts car had some dodgy wiring, but I think that was more the iginition, I'll do a test fit tonight of the parts car loom - click here for progress :(

[TRD ke70]

+1 for changing the whole loom, at least then you know what you have and not going to be chasing problems around the engine harness.

 

If you need a hand Tom/Justin, I'm sort of free after this weekend.

[TOMsGPTurbo]

Thanks heaps Chris, I feel really privileged and honoured with you and the guys offering to help me out.

Ummm before I came back to this topic I cut the plugs off the other loom and during the week soldered them onto the original loom :blush:

I don't really know how to describe how I am feeling about that decision now, but this should sum it up: :bash: + :laff: + :sob: + :yes: + :huh: + :no2: = :hmm:

 

This weekend, I have to do the mowing, put the round tyres on with air in them ... and push the car out onto the mowed lawn, get the scissor jack under it and jack it up and put it on axle stands, get under it and drain the fuel, wire up the TPS sensor, swap the 3ETE injectors to 4EFTE ones, swap the injector plugs to 4EFTE ones, and hopefully have the car ready to fit the loom and maybe a test fire up the following weekend.