ICM Delete

**Triple G** · 07-07-2010 07:10 AM

I am in the process of removing my Ignition Control Modules (ICM) and replacing my 4 wire coil packs with the cheaper updated 5 wire coil packs on my 2.7.
I have been able to follow this DIY up to the point of bypassing the actual ICMs

This is a wiring diagram showing the path from the ECU to the ICM to the stock Coil Pack on one bank of a 2.7:

I had it wired as follows and it did not fire:

Can anyone tell me what wire from the ECU fires which coil?

Here is a diagram of the other bank of of coil packs:

**SILVER A6 2.7T** · 07-07-2010 07:18 AM

whats the purpose of deleting the ICM?what do you gain?

**tike0rz** · 07-07-2010 07:23 AM

Sweet! One less thing to fail...

**Jason@Addict** · 07-07-2010 07:50 AM

Looks good

**Triple G** · 07-07-2010 10:15 AM

So wiring it this way:

is correct?

**Rated S** · 07-07-2010 10:17 AM

Originally Posted by tike0rz

Sweet! One less thing to fail...

One less part to fail, but replacing the coilpacks with a part that fails 10000x more then stock. I've thought about this route. Not worth the price of changing ICMs every 10 years, opposed to how troublesome those new coilpacks will be. Just ask the 1.8T guys how much they suck.

**Reich** · 07-07-2010 11:12 AM

Why don't you guy's use 034 ones? http://www.034motorsport.com/ignitio...ade-p-449.html
As what i can see, it also eliminates the powerstages.

**Triple G** · 07-07-2010 11:22 AM

034 route is quite expensive..

I've used these coils in 1.8T applications before and they haven't been troublesome. I thought this would be an inexpensive way to update my ignition system.

Just looking for a quick answer to my question so I can get my car back driving

**infinkc** · 07-07-2010 11:50 AM

Wow if this works this is great news, i see the diagram as this, please let me know if this works.
Edit see below for newer schematics

**Rated S** · 07-07-2010 11:57 AM

http://www.s-cars.org/postnuke/downl...structions.pdf

This should be helpful. Doing the same thing, but for a URS4/S6. We have a 4-pin connector iirc on our coilpacks, they have a 3-pin.

Also, with that wiring diagram above (re: infinkc), DO NOT SHARE GROUND WIRE between the coils, make a seperate ground wire for each one.

**Triple G** · 07-07-2010 12:15 PM

I'm not actually having trouble with wiring the new connectors for the coil packs. I have separate ground for each coil, etc.

Where I'm having trouble is bypassing the two ICMs. Instead of the one ICM the 1.8Ts run where it has 5 wires in (1 ground and 4 signal wires from the ECU) and 4 wires out (4 signal wires that go to the coil packs) we have the two ICMs. I'm trying to figure out what wire from the ECU fires what coil.

1.8T:

2.7T:

**Evilevo** · 07-07-2010 12:44 PM

Originally Posted by Triple G

I'm not actually having trouble with wiring the new connectors for the coil packs. I have separate ground for each coil, etc.

Where I'm having trouble is bypassing the two ICMs. Instead of the one ICM the 1.8Ts run where it has 5 wires in (1 ground and 4 signal wires from the ECU) and 4 wires out (4 signal wires that go to the coil packs) we have the two ICMs. I'm trying to figure out what wire from the ECU fires what coil.

1.8T:

2.7T:

Each ICM does it's own bank. I do not remember which ICM does which bank, but you can look that up in the Bentley manual or the link that Kevin posted.

**infinkc** · 07-07-2010 12:52 PM

they should all feed through to the respected wire across them, here is a pic inside. use the wire colors and trace them to the corresponding coilpack.

post back the results so we have them for reference.

**Triple G** · 07-07-2010 01:04 PM

Thanks, this is what I wanted to know. You can see why I asked though since you cross the wires over with the 1.8T ICM,

**infinkc** · 07-07-2010 01:19 PM

Originally Posted by Triple G

Thanks, this is what I wanted to know. You can see why I asked though since you cross the wires over with the 1.8T ICM,

oh just noticed something, on the schematic it looks like the wires do have to cross according to the pin numbers, Stupid confusing schematics..
UPDATED:

http://img228.imageshack.us/img228/1...eteinfinkc.jpg

**megafreakindeth** · 07-07-2010 01:20 PM

i was going to tackle this one after i finished everything else. replacing the icms with individual coils that have their own power stages is an improvement im sparking power over our setup. it should result in slightly more timing and you can run a colder plug/more gap. nothing huge compared to the cost but it should improve the feel of the car nicely. mabye some more mpgs.

**Triple G** · 07-07-2010 10:23 PM

Originally Posted by infinkc

oh just noticed something, on the schematic it looks like the wires do have to cross according to the pin numbers, Stupid confusing schematics..
UPDATED:

http://img228.imageshack.us/img228/1...eteinfinkc.jpg

This did the trick!

Thanks a lot, car is running way better now.

**infinkc** · 07-08-2010 07:22 AM

Originally Posted by Triple G

This did the trick!

Thanks a lot, car is running way better now.

What part number coil packs are you using? i want to make a new diy page for this.

**Triple G** · 07-08-2010 07:37 AM

Part number: 06B 905 115 E

Pretty sure they are the latest revision "E" coil packs. They are made by Hitachi.

**Triple G** · 07-08-2010 07:47 AM

I can also take a few pictures of what everything looks like this evening.

**NOTORIOUS VR** · 07-08-2010 08:05 AM

Hitachi coils FTW.

**P0234** · 07-08-2010 09:15 AM

A full writeup would be awesome. I'd love to see some back to back testing before I took the plunge though. I wonder what sort of plug gap these can support vs the stockers.

**Rated S** · 07-08-2010 10:52 AM

Did you put on BEL 2.7T valvecovers to support the "pushdown" coils, or just put them in the stock covers?

**Triple G** · 07-08-2010 10:55 AM

I used the bolt down Hitachi coil packs:

**titikaka** · 01-16-2011 02:13 PM

any DIY on that for our S?

any reviews....?

**O2VW1.8T** · 01-16-2011 03:48 PM

sweet will be doing this, cause im missing the icm's from my engine i bought.

**BlakMarketKlash** · 01-16-2011 05:15 PM

alright! glad u got it solved.

**Giotown** · 08-06-2014 11:25 AM

Originally Posted by Triple G

I can also take a few pictures of what everything looks like this evening.

i would love a wite up to this with pics ... i want to do this next and cant find a place to have all the data i need to do it ...

**Taloras** · 08-06-2014 11:40 AM

Originally Posted by Giotown

i would love a wite up to this with pics ... i want to do this next and cant find a place to have all the data i need to do it ...

Holy zombie thread, batman!

This has been DIY'd a million times since this thread came about. Some more searching will turn up more threads with more pics and more steps.

**Giotown** · 08-06-2014 12:36 PM

Originally Posted by Taloras

Holy zombie thread, batman!

This has been DIY'd a million times since this thread came about. Some more searching will turn up more threads with more pics and more steps.

i just cant seem to find anything

... i keep turning up with older threads and keep getting stuck ... sorry guys

**Breppinq** · 08-06-2014 02:21 PM

http://www.audizine.com/forum/showth...-0T-Coil-packs

all you need is right here dude

**OHS4** · 08-06-2014 06:41 PM

http://www.audizine.com/forum/showth...-Solder-method

Best^^^^

**infinkc** · 08-06-2014 06:50 PM

Wow the thread that started it all. Wow 4 years!

**vtraudt** · 11-18-2014 12:27 PM

Originally Posted by infinkc

oh just noticed something, on the schematic it looks like the wires do have to cross according to the pin numbers, Stupid confusing schematics..
UPDATED:

http://img228.imageshack.us/img228/1...eteinfinkc.jpg

Can someone 'redraw' the schematic since the photo links are gone? What does "wires have to cross according to pin numbers" mean? Which pins go to which cylinder?

They should be
Cyl 1-3
94
110
102
Cyl 4-6
95
11
103

But not sure which pin to what cylinder?

Also: brown ICM connectors for bank 2 (cyl 4-6, driver side, left side), black ICM connectors for bank 1 (cyl 1-3, passenger/right side)?

**vtraudt** · 11-18-2014 12:32 PM

The diagram shows:
94 to cyl 3
102 to cyl 1
110 to cyl 2

Is this correct?

**vtraudt** · 11-18-2014 12:43 PM

Like this?

**vtraudt** · 11-18-2014 12:51 PM

The 4 pins of the new FSI coil connector:
pin 1 +12V from harness (old connector pin 15 (ro/gn = red/green)
pin 2 and pin 4: ground from old harness (old connector pin 4a (br/ge = brown/yellow)
pin 3 signal from ECU via old harness 4 pin connector (94=gr/ge, 110=gn/gr, 102=ws/gn) to old harness 3 pin connector pin 1 (br/bl, br/gn, br/ge).

**vtraudt** · 11-22-2014 03:42 PM

Originally Posted by infinkc

oh just noticed something, on the schematic it looks like the wires do have to cross according to the pin numbers, Stupid confusing schematics..
UPDATED:

http://img228.imageshack.us/img228/1...eteinfinkc.jpg

Can some PULEASE confirm that (using Bank 1 as example) the the signal lines are correct as shown in the 'crossed over' schematic:
94 pin goes to cyl 3
102 pin goes to cyl 1
110 pin goes to cyl 2

I have wired bank 1 (bank 2 left alone for now) per schematic (+12V from harness (red/green) on pin 1, ground pin 2/4 (and to valve cover), pin 3 signal according to above.
But it does NOT start! Double and triple checked.
Plugs are sparking, not no start (just a random 'puff' once in a while).

**infinkc** · 11-23-2014 08:59 AM

Originally Posted by vtraudt

Can some PULEASE confirm that (using Bank 1 as example) the the signal lines are correct as shown in the 'crossed over' schematic:
94 pin goes to cyl 3
102 pin goes to cyl 1
110 pin goes to cyl 2

I have wired bank 1 (bank 2 left alone for now) per schematic (+12V from harness (red/green) on pin 1, ground pin 2/4 (and to valve cover), pin 3 signal according to above.
But it does NOT start! Double and triple checked.
Plugs are sparking, not no start (just a random 'puff' once in a while).

That is correct, i need to fix the broken links when i have a chance, its been awhile.