Coil Pack wiring harness

[Matt336]

Will a coil pack wiring harness from an 1.8T MKIV Jetta/Golf work in a 225 TT?

Does anyone have a part number for the stock 225 TT coil pack wiring harness?


Modified by Matt336 at 10:50 PM 10-2-2009

[2001TTransport]

the stock 225 is way to expensive they don't sell just a cut in model. However, you can use the MK IV for it or the 034 model rather than replace your entire harness

[Matt336]

So the MKIV harness will work? I want to just buy the harness and get it covered good so I don't have to worry about this problem anymore.

[Matt336]

bump.

[Oh_My_VR6]

I'd like an answer to this as well. Anyone know?

[l88m22vette]

I can't see how they'd really be different, its not like VW completely rewired the car just because its a TT and not a GTI or GLI...PM INA for the straight answer

[speed51133!]

bump....

anybody?
my 225 harness has a capacitor in it that says BERU. I dont see it in the ECS pics.

[Boulderhead]

bump....

anybody?
my 225 harness has a capacitor in it that says BERU. I dont see it in the ECS pics.

Why not just buy a new one for $100

[Matt_B]

I fitted the vw coil pack wiring replacement harness and took it back to the ECU. The only difference was I had one of the colours on the coil pack signal wires was different.
Not an easy job but worthwhile.

[DougLoBue]

It is compatible but the MK4 ECU is located about 6-8" closer to the center of the car than the TT's ECU so you will find that the new harness is about 6-8" shorter than required. It WILL reach, I'm just pointing out the difference.

I've used the same harness on my TT a few times and my A4. You can always make things work.

[speed51133!]

thanks.

but what about that beru capacitor?

and for 100 i would buy the "right" one.
show me where you can get it...

[Boulderhead]

thanks.

but what about that beru capacitor?

and for 100 i would buy the "right" one.
show me where you can get it...

Where I got mine

http://www.ttstuff.com/mm5/merchant....ry_Code=T1MENI

[DougLoBue]

thanks.

but what about that beru capacitor?

and for 100 i would buy the "right" one.
show me where you can get it...

The capacitor doesn't actually do much of anything. It serves as an extra group to the same group of grounds that attach to the others side of the valve cover.

The $100 TT stuff one is just an overpriced mk4 unit. That is actually more expensive than my $70 local dealer price.

[speed51133!]

oh, thanks.

i did not have the capacitor grounded. it is tucked in the loom.

i guess it should be bolted to the valve cover?

[Corrado SLC NL]

Still waiting on my Tat stuff one as well, keep getting misfires and I know the plugs are messed up

[1fast2liter]

ecs tuning has them for about 59 or so shipped oem part#1j0971658l.

[Boulderhead]

The $100 TT stuff one is just an overpriced mk4 unit. That is actually more expensive than my $70 local dealer price.

Thanks Doug, that is good to know, and hopefully helps others who will need a new harness in the future. Cheers

[1fast2liter]

Fyi I put mine on last night. The harness is about 6 inches to short. Had to cut splice and soder and shrink wrap or all

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[speed51133!]

Was the harness short just by the Ecu or the other plug connector as well?

[1fast2liter]

All of them cept for the 1 wire purple black plug. I just cut and spliced soldered and shrink wraped it all

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[DougLoBue]

All of them cept for the 1 wire purple black plug. I just cut and spliced soldered and shrink wraped it all

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Honestly if your already cutting your better off cutting the harness close to the front corner / side of the motor and soldering everything in there.

If you run the harness separate from the main wiring harness all the pins will make it to the ECU/connector.

[1fast2liter]

I tried that to run it seperate itvwas about 6inchs to short when I taped it up I taped up coil harness separately. I was told the harnesses were made for the vw also wich is closer to the center of the car then the tt is

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[speed51133!]

Urgent!!!!
So my coil harness has wires that do NOT go through the waterfall OR the 14 pin connector. It has a few wires that run along side of the head by the Sai port and down behind the motor. WTF do i do with these?? they end up part of the common ground connection by the coil plugs. i just cut them and will try to ground them somewhere.

[DougLoBue]

Urgent!!!!
So my coil harness has wires that do NOT go through the waterfall OR the 14 pin connector. It has a few wires that run along side of the head by the Sai port and down behind the motor. WTF do i do with these?? they end up part of the common ground connection by the coil plugs. i just cut them and will try to ground them somewhere.

Three pin connector on the end of it? That's your speed sensor, it has a silver protective sleeve on top of it right on the back of the trans.

The wires that terminate at the 14 pin connector are a shared ground and the two wires for the speed sensor.

[Corrado SLC NL]

How was the install? Any pics taken?

[1fast2liter]

its pretty straight forward. theirs 3 plugs in the water fall. 2 of wich you will tap into. theirs one with like 7 or 8 wires that you will replace 3 of them. another one that has a 1 wire connection into that one will be replaced with a plug so no pinning on that. then the other 4 go to the small plug on the ecu i know pins 93 and 92 were 2 of them.also you get a new plug for the speed sensor as well. its pretty much color for color unless they changed i did not have enought wire to actually reach the ecu. the harness was also made for the gti and as such was about 6 inches to short as the gti ecu was spaced more toward the center of the car.. if they dont reach cut splice solder and heat shrink to connect. it was simple to do just time consuming. take your time when doing in. i also laid the harness in as seperatly as possible so if theirs ever a problem i can just follow it to its connections.

[speed51133!]

well i figured out it was the speed sensor, but there was ONE wire, a ground, that ran along the head, and down the back side of the block. it is part of another harness. It lead to the common ground by the coils. I just cut this wire and crimped a ring on it and bolted it to the engine.

I also had a 2 plug connection that went to one of the emission components i had deleted a while ago and have a resistor plugged into it. it is right on top of the valve cover. i had to separate the wires from this plug out of the coil harness, kind of a PITA.

other than that it was fine. some fooling around with the smaller pins on the 14 pin connector. the tool i had was too big for the tiny wires. I used sewing needles.

for the install i removed all of the protective tape and loom wrap from the harness just to the waterfall, and cut it there. I also just pulled out the ecu pins and cut them. In retrospect, I dont think it is necessary to remove all the loom tape. It just made the job a TOTAL PITA. Re-taping the harness is really hard. There is NO ROOM to get your hands in there under the intake manifold. A smarter solution would be to just cut the harness just below the head. The replacement harness is all sealed anyways.

The replacement harness was also long enough. NO cutting or splicing. I did not have time to re-tape everything up, so i just drove it to work this AM with some of the wires still loose. It runs WAYYYY better. I was getting misfires and stalls when coming to a stop. Also hard cold starts. This is all cured now, at least this morning it was...

did not take pics, it is pretty straight forward. The new harness was NOT color coded the same, but all the wires were labeled with tags stating which pin they go to. so it was not an issue.

I still would like to know if others had that mystery wire going behind the engine, a brown ground. ...

[1fast2liter]

The Brown ground in mind was connected to the coils and was in the harness. Went into the waterfall to the 14 pin connector. Also mine had a new speed sensor init.

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[speed51133!]

the coil harness has MANY grounds, not just 1. they are all connected by the coils with a heatshrink.

one of these wires did NOT go to the waterfall, and went towards the speed sensor, but dipped down, along the back of the engine. Im guessing it may be for the oil sensor? Have not had time get get under the car...

[1fast2liter]

Ah the harness I had was just the cool harness itself and the speed sensor. Still I agree was a pita to do but I hope it helps in the end. Side note the pvc valve wasnt hooked up under the intake manifold so could have been my cause of major stumble going into boost also

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[speed51133!]

my harness was just the coil pack as well.
http://www.ecstuning.com/Audi-TT_MKI...ical/ES279844/

take a look here. you can see that part of the coil harness is the speed sensor plug. there is ALSO another plug next to it. I suspect this is the oil level sensor and is part of the coil harness.

this is probably why they dont sell a coil harness for the 1.8t 225.

does anyone have an oil sensor AND has replaced the coil harness?

[1fast2liter]

Holy crap you paid a 1000 for that harnes? I got the 50 one. Lol

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[speed51133!]

no, i got the same one you did for 50$. You can see in the pic i linked that the coil harness includes wires that go the the oil sensor. there is a ground that s grounded in the coil harness's common ground. This ground was not part of the 50$ harness. I had to cut the wire and ground it to the block.

The AMU engine also has a few other things like a 2 prong plug for an emissions device and an extra ground with a BERU capacitor.

[1fast2liter]

Ah ya my stock harness had that capacitor bit no connection for it

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[Corrado SLC NL]

so you guys saying that the AMU engine cant use the cheap harness? I have all the extra plugs and now my BERU capacitor just fell off the harness.

What can I do?