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 Post subject: 1989 GTi engine into MK3
PostPosted: Tue Apr 07, 2009 4:38 pm 
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Location: New York State
I'm putting the DOHC from a 1989 GTi in my '94 Metro. The Metro now has the SOHC 8-valve 1.3L from a 1992 Swift in it. When I did that swap, I used all of the wiring harnesses from the '92 Swift, except for the rear body harness. It seemed like the easiest option since I had both cars torn apart and they were both MK3. Now I realize the MK2 GTi engine harness won't plug in under the hood or under the dash. What's the easiest way to tackle this? How much of the MK2 wiring should I swap over? It looks like I can swap the plastic connector shells to get the engine harness plugged into the car. But then I'm still left with the SOHC ignition coil wiring and injector resistor. Should I just use all of the GTi wiring except for the dash harness? MK2 has to meet MK3 somewhere. I'd much rather swap pins in connectors than cut and splice the harnesses.

I can figure this out on my own, I'm just looking for some tips, advice or opinions before I'm tangled up in wiring harnesses from 2 or 3 different cars. :lol:

_________________
1994 Metro - MPH project (getting a DOHC G13B)
1994 Metro - MPG project (getting an XFi G10)
1992 Swift - Parts car (gone)
1991 Swift - Parts car (gone)
1990 Swift - Parts car
1997 Metro - Parts car (gone)
1993 Metro - Parts car
1989 Swift GTi - Parts car
1998 Metro - Parts car


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PostPosted: Sat May 02, 2009 1:48 pm 
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Joined: Wed Sep 13, 2006 4:19 pm
Posts: 234
Location: atlanta, georgia
Do you still need help with this?


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PostPosted: Mon May 04, 2009 10:45 am 
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Location: New York State
tetsuoironman wrote:
Do you still need help with this?

Sure, I haven't done anything yet other than pull out the SOHC engine.

_________________
1994 Metro - MPH project (getting a DOHC G13B)
1994 Metro - MPG project (getting an XFi G10)
1992 Swift - Parts car (gone)
1991 Swift - Parts car (gone)
1990 Swift - Parts car
1997 Metro - Parts car (gone)
1993 Metro - Parts car
1989 Swift GTi - Parts car
1998 Metro - Parts car


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PostPosted: Mon May 04, 2009 6:19 pm 
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Joined: Wed Sep 13, 2006 4:19 pm
Posts: 234
Location: atlanta, georgia
Basically you can use just the gt engine harness. Take the square connection off the sohc harness and put that on the round gt harness. The under dash harness which is a green rectangle on the gt i believe will be taken off and you will use the sohc clearish square one in it's place. For the ignition signal you will tap into the noise suppessor, brown wire I think, and put that into the gt ecu pin a12. You will have to disconnect the injector resistor or you will will keep blowing ignition fuses. You will have to run the oil pressure switch wire into the under dash harness as well.

I did the same swap in a 92 swift sohc and put the 89 gt engine into it. I used the sohc fuel pump, igniter, and coil, but later switched to a msd blaster coil. have been running for over two years without to many issues. The main one being I kept frying alternators for about 6 months after the swap. No problems in the past year and a half.

i will take a look at exactly which wires go where tomorrow and let you know. Hope this helps for now :D :D :D


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PostPosted: Tue May 05, 2009 4:43 pm 
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Location: atlanta, georgia
Okay the square connector for the engine harness, cut the engine harness side off the sohc and splice these wires from the gt into it.
If you are looking at the backside of the of the sohc connector and the tab is on the top, you will put the gt wires into it as follows: from top left to right it would be like this
__-__
[1234]
[567 ]
[8910]

1 top left-blk/wht red striped
2 blank
3 blank
4 top right brn/yel silver striped
5 middle left blu silver striped
6 middle middle pnk/wht
7 middle right wht/blu
8 bottom left purp/grn
9 bottom middle blank
10 bottom right blank

you should have a blk and a wht/blk leftover I taped these up and did not use them.

Onto the under dash connector. same as before cut the connector off the sohc engine harness and put the wires from the gt into it. With the connector tab on top and looking at it from the backside: with top left being number one and bottom right being number 19.

1 top left purple
2 top right blank
3 blank
4 yel/grn
5 blank
6 purp/yel
7 blank
8 blank
9 blank
10 light blu/red
11 white
12blank
13 yel/wht
14 blank
15 wht/red
16 red
17 blank
18 the bigger opening on the bottom big blk/yel
19 yel

You will have to run the oil pressure switch wire to the connector also
The brown wire that you tap into at the noise suppresor will go straight to the ecu terminal a12.

These are from some notes I took when i did the swap. Hopefully you can make some sense of it. I'll see what I can do about pictures.


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PostPosted: Wed May 06, 2009 7:31 am 
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Location: New York State
Thanks! :D
I'll have to take a look at the car to follow along.
You take notes? :shock: I never take notes when I do stuff like this. Maybe I should!

_________________
1994 Metro - MPH project (getting a DOHC G13B)
1994 Metro - MPG project (getting an XFi G10)
1992 Swift - Parts car (gone)
1991 Swift - Parts car (gone)
1990 Swift - Parts car
1997 Metro - Parts car (gone)
1993 Metro - Parts car
1989 Swift GTi - Parts car
1998 Metro - Parts car


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PostPosted: Wed May 06, 2009 11:05 am 
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Joined: Wed Sep 13, 2006 4:19 pm
Posts: 234
Location: atlanta, georgia
Sometimes notes are a must. All the info cannot be stored in head. :D


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PostPosted: Wed May 06, 2009 11:07 am 
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Location: atlanta, georgia
Since you did the 1.3 sohc swap this should be fairly easy for you. most of the wires are the same colors. For the most part.


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PostPosted: Tue Jun 16, 2009 4:10 pm 
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Location: atlanta, georgia
Any progress done to the swap?


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PostPosted: Thu Jun 18, 2009 12:31 am 
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No progress to speak of. I have a lot of projects, so none of them get done. :lol:

_________________
1994 Metro - MPH project (getting a DOHC G13B)
1994 Metro - MPG project (getting an XFi G10)
1992 Swift - Parts car (gone)
1991 Swift - Parts car (gone)
1990 Swift - Parts car
1997 Metro - Parts car (gone)
1993 Metro - Parts car
1989 Swift GTi - Parts car
1998 Metro - Parts car


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PostPosted: Thu Jun 18, 2009 6:10 pm 
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Joined: Wed Sep 13, 2006 4:19 pm
Posts: 234
Location: atlanta, georgia
I know exactly how it is. I would stop on the other projects and focus on the gt swap. :lol: :lol: But seriously once you get around to it you'll have a blast. Best of luck!!!


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PostPosted: Fri Jul 17, 2009 9:29 am 
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Joined: Mon Apr 14, 2003 11:31 pm
Posts: 2457
Location: New York State
I've been working on the swap again. I'm just going to use the wiring from the MK2 GTi and modify the MK3 dash harness. And yeah, I'm taking some notes. :thumbsup:

_________________
1994 Metro - MPH project (getting a DOHC G13B)
1994 Metro - MPG project (getting an XFi G10)
1992 Swift - Parts car (gone)
1991 Swift - Parts car (gone)
1990 Swift - Parts car
1997 Metro - Parts car (gone)
1993 Metro - Parts car
1989 Swift GTi - Parts car
1998 Metro - Parts car


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