I went ahead and bought and installed an MSD DIS-4 in my car. Turns out I need a tach adapter to make it not throw a code, so I unplugged the MSD box and put in the bypass plug (returns everything to stock) and now when I turn my car off, but dont open the door, the PCM? (blue thing in glove box) hums loudly, until I open the door. Any ideas on whats up with it?

Nevermind, problem solved. :cool:

What was it? I called two of my mustang buddys but they couldnt give me anything concrete enough to post.

Big Joe

The problem was with the wires. There were two wires that, in the instructions, were to be hooked up to a 12v source. But when I took them off the 12v source, everything worked fine. I didnt lose any of the boxes capabilites, so I guess everything is kosher.