[Salemetro]

The symptoms that you are describing would tend to indicate more of a chance of the ignition module being suspect, rather than fuse box. I'm curious how you came to the conclusion that the fuse box might be the problem. Sometimes, without use of a scope, it can be very difficult to accurately diagnose a faulty module due to the sometimes intermittent nature of the problem. Often (but not allways) a check engine light will be triggered due to a detected misfire, and it will be easier to diagnose. Sometimes, you end up just having to replace it to eliminate it from the list of possibilities. I have had a few cars with defective modules actually test to be good modules....talk about a headache to figure out! Sometimes (rarely) blind replacement is the only option. Best of luck to you.