So I replaced my headgasket on my 96 Tsi and now that everything is back together Im not getting any spark at the coil pack for cylinders 4-1. I have pulled the coil pack and the igniter and tried them on another dsm, and they worked just fine. So whats next? how do I find the faulty wire? or if its the cpu? I was told its not the crank angle sensor because if it was I wouldn't be getting any spark, and I am currently getting spark afor cyl. 2-3. Also its not the spark plug wires because I switched them around and still the same out come. no spark at cyl 4-1. any help would be great.

Thanks,
Jeff

The only thing I can think of is you must have bumped some wires or the coil when removing the head. Either that, or it is a huge coincidence that your coil died at the same time you did the headgasket.

I am assuming all of the correct plugs are installed where they need to be on the head? Is everything properly grounded?

well the coil is fine, I put it into another dsm and it worked fine. As far as I know the plugs are all in the correct place, I labeled them as I pulled them off, but aren't all the plugs diff shapes? if not wich ones are similar, I can try switching them. also the only ground I can think of off hand is the one attached to the intake manifold is there another? if so where? so I can check to see if I have connected it or not.

Thanks,
Jeff

If its not coil, not ignitor/transistor, not plug wires, then it's either ECU or wiring harness.
Probably injector driver on the ECU. Unlikely maybe, but that's what I'd check next anyways.

how do I check those?

Crap, my cool picture didn't show up

Click this link- the diagram is GREAT for troubleshooting ignition problems

http://www.taboospeedshop.com/ignition.htm

Without looking at the chiltons/shop manual, I'd hook up a voltmeter at various points, starting right at the injectors, to test for 5V switched power or a switched ground, whichever it uses (don't remember). Just use Cyls 2-3 as a reference.