No more spark on the 3 cylinder

Moin, moin Have there a small problem My Audi 80 B4 2,0 ABK has no spark of ignition on the 3 cylinder. Compression I measured, on all cylinders 11 bar up to the 3 that has 10,5. It all started with it that it badly sprang and it heard that the ignition does not fit properly. So then I looked in here and checked the pure sequence of the ignition cables. here is that the 1 cylinder must be at the notch of the distributor and then the row follows after clockwise w with my audio it was but 1.3.2.4. then changed that and then he didn’t even jump on. I rebuilt everything again as it was before and now the 3 cylinder no longer runs with. As I tested the ….. engine turned on and then 1 cylinder pulled off then he went off. And that was done with all, he always went out except at the 3 then he stayed on and ran just as before. Need urgent help from you. MFG