mk4 golf 1.8 conversion wiring help , NEWBEE!!!!

[bikemech]

hi all converting my 2.0 8v mk4 golf GTI to the 1.8 20v turbo, mechanicaly i have no problem in doing this myself, problem am having is with the wiring,
this is the third forum i have been to with the hope someone can help me here, no one else seems to want to know,
i know i have to change quite a lot of things inc , ecu and everything else that is coded together (HAVE VAG COM), just stuck on the plugs situation,

will explain more if anyone has any info or done this before,
thanks in advance for any help,
pete.

also sorry if i have posted this in the wrong place and please move th where it should be

[h100vw]

A fella on here called Stan did this swap last year. Started as a 1.6 though.

If you google AGU wiring diagram, assuming it's an AGU engine you are fitting. You should find some wiring diagrams that will help you out. It's mostly plug and play.

If you are using a different engine code, google that instead.

Gavin

hi all converting my 2.0 8v mk4 golf GTI to the 1.8 20v turbo, mechanicaly i have no problem in doing this myself, problem am having is with the wiring,
this is the third forum i have been to with the hope someone can help me here, no one else seems to want to know,
i know i have to change quite a lot of things inc , ecu and everything else that is coded together (HAVE VAG COM), just stuck on the plugs situation,

will explain more if anyone has any info or done this before,
thanks in advance for any help,
pete.

also sorry if i have posted this in the wrong place and please move th where it should be

[bikemech]

hi gavin thanks for your reply, yes am using the agu motor and wiring, have both looms from engine to ecu and have ecu and clocks. problem am having is not where the engine looms plug into the engine, but how to merge agu looms to the 2.0 8 valve engine bay loom, there is a big connector missing under the plastic trunking on the right hand side where the bay loom and engine loom connect, will post a pick to show what i mean,
thanks.

[bikemech]

missing plug on the 2.0 8v engine bay loom

[h100vw]

Off the cuff statement coming up. If there's a plug missing off the car, you think should be there, I'd be taking a trip to the scrappies to get it and associated wiring.

However, If you have pulled that motor out yourself, then all the wiring you need should be there.

Maybe you don't need to connect to that plug and it can be removed???????

Gavin

[bikemech]

yeah me being stupid didnt think i would need that bit and assumed it would be on the other car, going to buy the wiring i need off ebay, have a seller saying he has it , just hope it is removable complete without going into the dash and having to tear the whole car apart, any ideas what this plus is for? going to have to connect it somewhere as the new agu motor loom has the plug but the car dont.

[h100vw]

Anybodys guess without a diagram mate. Do us a closer in photo with the wire colours. Where's all you headlight wiring at???????

[bikemech]

sorry if i never said the pic is of the car i removed the engine from (crashed donor) thats the wiring i need to be there, its purple inside, i have the engine loom that is supposed to plug into it so i can have a look tomorrow and post what colour wires go to it if that would help,
thanks very much for the replys so far, this is the third forum i have been on and no one seems to want to know

[h100vw]

I suspect it's the wiring for the headlights. seeing as the front is gone and I can't see the loom rolled back out of the way.

Gavin

[bikemech]

this is the 2.0 8 valve car i am putting the 1.8t motor into, the top red circle is the origanal loom from the car where the plug is missing, and the bottom circle is the 1.8t loom from engine to ecu, thi is where the 2 looms should connect, am i going to have to change the main loom to be able to solve this, the main loom supplys the wiper motor, alarm horn, lights, indicators, and most other things, anyone have a way round this please?

[bikemech]

and another little problem

any ideas on these, green plug does not fit in the white socket

[h100vw]

any ideas on these, green plug does not fit in the white socket

That plug would go to another green one normally. Makes it easy to assemble and check it's correct. I guess the otherside is still in the donor? Alternatively, look at the colours of the wires in the white and green plugs. If they are the same then remove the key way o allow the plugs to mate up. DON'T do this if the wires are different, you need to work out why.

Seriously, you need a set of wiring diagrams, for both cars, to make life easier. I'd have a look for Stan's thread he had some issues like this and hunted down diagrams IIRC. I only have AGU engine ones, no 2 litre. I just googled the engine code and diagram to find them.

The plug in the big circle has a yellow and black wire which could be a dip beam but I can't see the main beam, so I don't know for sure.

Gavin

[bikemech]

also origanal engine code was was AQY

[bikemech]

if you have the wiring diagram for the agu would you be able to send me a copy please,
searched google and keep finding everything but what am looking for, if anybody has a copy of the wiring for the AQY i would be gratefull for a copy to,
thank you.

[h100vw]

https://docs.google.com/file/d/0Byfwta17Q-zaQ19ic21BOGVJc00/edit?pli=1