Fitted the new coil pack loom today. Big thanks to Tuffty for putting up with my constant questions on FB but I like to know what I'm doing before I start cutting wires related to the ignition
Anyway, it was fairly straight forward once I'd begun to strip both looms back. It took my around 3 hours to do the full job but most of that time was spent stripping the looms then taping it back up afterwards.
Started by getting everything out the way. This meant removing the strut brace, charge pipe, air filter, and disconnecting the battery:
I then removed the coil pack wiring and removed all the black tape to reveal all the wires:
As you can see, it was pretty bad!:
I traced the wiring to see where the cracking stopped and it was pretty much as soon as it was away from the manifold area. I found it easier to remove the injector harness and restricting sensors:
The 2 wires seperated to the right in this pic were my extended N249 wires as I'd relocated it out of sight.
As well as seperating the N249 wiring I also seperated the N75 wiring so I didn't cut it by accident:
As you can see from this pic, the quality of the wiring where it meets the injector harness is fine so this is where I chose to splice the new loom in:
It was now time to have a proper look at the ECS harness I'd purchased from Awesome GTI:
It comes with a load of sensors and connectors that are no good for us as we're only interested in the coil pack stuff. I started to remove the insulation tapes:
You should end up with this:
Now it's easier to trace each individual wire.
When tracing the wire between old and new looms I found it easiest to break it down into 3 sections. These 3 sections are the thick heat shrinked junction sections. 1 junction shown here:
The only difference I spotted is that one of the coil pack connector wires loops out the bottom of one of the junctions instead of straight out the top like the standard one:
I laid both looms side by side and started working out what went where:
It's a simple case of tracing each wire 1 at a time, cutting the old, and soldering on the new. Once they were all done I was left with this:
I then spent a good hour wrapping everything back up and making sure it all routed correctly. I started up the car and everything was fine. Went out for a blast and the car feels brand new, really smooth. I must have had slight missfires for a while looking at the state of the wiring. Really happy with it now.