Z32 Ptu-VW/Audi coils

First of all you don't need a plenum spacer actually, I found a better way and they fit fine. I haven't had good luck with the coils on my car and the PTU's are not the best. Plus stronger spark is always better. Here is the write up: Disclaimer: This procedure does require a plenum pull, soldering, wiring, time, and patience. If you are not good at or do not have those please do not attempt. Also I performed this on my 1991 N/A so wiring colors may differ in later years. I am happy to help if you can not figure it out but if you break something I take no responsibility. Please read the whole post before attempting. A warning: With this swap if you need to change the plugs or a coil it does require the plenum to be pulled, although with this swap it makes pulling it a lot easier. Stuff you will need: Six VW/Audi Ignition coils part number: 06B 905 115L (make sure it has "L" or "R" at the end as they are the updated parts). These are supposed make 30kv. Edit: I just replaced all of mine because I put in used coils for the initial install. The latest part number from VW is: 06A 905 115D I recommend buying new coils. They are pretty cheap. Side not: All I have found so far says that our stock coils make 21kv.(please correct me if I am wrong) Six electrical plugs to fit the coils. I got mine from a new VR6 engine at a partsyard. The part number for one plug is: 4B0 973 724 I highly recommend getting the plugs from an existing wiring harness or else you have to buy the wiring and sealing grommets. The 1.8T Plugs will work too you will just have to find two harnesses to cut from. Solder, soldering iron, flux, heat shrink, heat gun, and electrical tape. The how to: First: Pull the upper intake plenum. This has been covered many times so I will not go into it. Second: Plan ahead and figure out how much of the harness you want to open up. You can simply cut the plug for each coil off. I chose to re-route the injector wiring to run under the plenum so I opened up the harness almost all the way to the main harness near the brake booster. Injector and fuel temp. sensor wiring: Third: Now that you have your plan of attack its time to wire the coils. On our coils the middle wire is B+, the small black wire is ground, and the red/color wire is the signal(except number one which is black). On the VW coils they are numbered 1-4. #1 is B+ so it connects to the middle wire from stock plug. #2 is ECU ground circuit so it connects to the small black wire from stock plug. #3 is signal from ECU so it connects to our signal wire. Cyl. 1 black. Cyl 2 Red/White. Cyl. 3 Red. Cyl. 4 Red/Green. Cyl. 5 Red/Yellow. Cyl. 6 Red/Blue. #4 is ground, our coils do not have four wires so you will need to either ground each coil or connect the three on each side of the engine and run one wire to ground. Plug wires. I found a good ground on the right side off of the cam timing adjuster, I also grounded the fuel rail ground there. For the left side i used the stock ground location on the upper plenum near the idle air control valve. Step Four: You should now have the six plugs wired up. You can now install the coils, it should look something like this. Right side. Left Side. Step Five: You can now install the upper plenum. Make sure the coils clear, they should all be straight except the number two coil should turn slightly forward. Make sure if you opened up the harness that nothing is getting pinched or pulled on. Step Six: The PTU bypass wiring. Its pretty straight forward. Just connect the wires straight across. The ground is not used. I had relocated my PTU previously so it made the wiring pretty easy. If you have an S2 PTU then you can remove the little harness that came with it and splice it out of the car. Orange-Pink Blue-Brown Green-Purple Red-Light Blue Yellow-Grey White-Turqoise The end result is a clean upper plenum. You could take it a step further and grind off the tabs that the old coils bolted onto. It now takes less then 10 minutes to pull my upper plenum. This is my first write up so if I left anything out or you have any questions please let me know