Check it in the dark with a water spray bottle...
1. Fill an old windex spray bottle with water.
2. At night start your car and pop the hood.
3. Lightly spray the water around your coil and on your wires.
4. Look for little blue sparks jumping off of your wires and/or coil.
Replace anything that has spark jumping from it.
1998 BMW 540i Sport
1989 BMW M3
1979 Triumph TR7 (1st car)
1986 BMW 735i (Sold)
1980 BMW 320i (Sold)