ignition: possible wiring, or faulty contact

What is your question?

I bought some fuel that had water in it a few weeks back... after cycling out the bad stuff, changing the fuel filter, the spark plugs and the ignition coils.. the truck is still missing in the #2 cylinder. I had 2 second opinions as well as mine... there is n knocking, she still missing. we figured maybe the fuel injector, so I changed it. still missing. I am going in for a diagnostic run on Wednesday as the only local diagnostic machine is down till then, how ever both my mechanic buddies and I are all kinda stumped. I am thnkin it might be the contact to the ignition coil. I should find out for after the diagnostic, but just curious what your thought's on it might be.