Instead of posting this each time I have to let someone know how to do it.  Here it is.

Cylinder drop test is done this way.

When the symptoms show up on your engine.  

1. Turn it off.
2. Remove ONE spark plug lead and ground it. <---Place bolt into it and allow it to touch the engine block.
3. Restart engine and see if the engine runs any different.  If it does run differently, that cyl is most likely working properly and is not the problem.
4. Turn it off.
5. Replace the spark plug lead and remove a different one.
6. Follow the steps above until you isolate the cyl causing the problem.

TMD