The grounding problem could be it, what you have now is not adequate. You want a heavy gauge ground going from the battery to the engine block (4 gauge or heavier), another good ground from the battery to the body, and while redundant another good ground between the engine and the body and is a good idea. You should also run one between either the body/subframe or engine/subframe.

If that doesn't clear it up, my other guess is a bad alternator or a bad wire leading to the voltage sensing terminal on the alternator. The factory hooked the sense wire up to the horn relay, which was the main power take off point for the electrical system. It's always a good idea to hook up the sense wire to your main distribution block that way the alternator maintains the proper voltage at your distribution block, rather than just proper voltage at the output terminal.

Troy

Well, the battery is iin the trunk and is grounded to the body at the ridge where the trunk hinge is on.

The main issue with all of these ideas is that it ran perfectly fine for a while with the current set up. If the wiring were all wrong from the get-go it would have never run right. But I'm up for anything.

I've been bed-ridden ill for the last couple days so I haven't gotten out to the car to mess with it. Once I do, I'll post what did/didn't work.

Oh you puss, did you break you foot again. ;) just messing with ya man. Hope ya get better soon and get the problem fixed. Call me some time maybe both of us messing with it might be able to figure something out.