I have made several posts regarding my 95 B4. I have replaced several parts and dumped countless hours chasing this problem only to be left frustrated and the car running no better.
The car runs great and after 20-30 minutes, "boom" it starts to mis, only on 3 & 4. There is no spark jumping from the coil from those 2 points and only those 2. When the car is running, it will run and cycle the fans...heat up and cool down but, in 20-30 minutes it is all done and wants to misfire.
What been done to remedy:
1. starter and battery (after several no start attempts)
2. CS (Blue coolant sensor)
3. all relays (every single one)
4. ECU and relay
5. spark plugs
6. fuel pump and filter and relay
7. opened exhaust
8. new coil, less than 5k ago