I didn't do the swap. The battery is still under the hood. The three ground wires are tight. Here's a little update- I reconnected everything that I had disconnected (TPS & DPFE), tested the power at the TPS connector, tested the battery (14.43 volts when idling). I also looked at fuse box again. The wires look fine, but there are three different colored wires under the box that are tight and look like they are taped together. It was kind of dark, so I couldn't really tell, but when I pulled up on the box, it seemed like the wire was either pulling through from below, or the electrical tape was just stretching and nothing was attached... Also, when I first got the car, it had a loose body ground which I thought was attached to my passenger side fender on my other one, so I reconnected it last week when I did the CAI, or about when the problems really started to be bad. I disconnected it again last night and shoved the connection down in the weather stripping on the cowl by the cabin air filter. I drove the car around on city streets in low gear and had no problem going above 4K several times. I decided to go get some gas, so I pulled out on the main road and floored it, inducing tire spinning and wheel hop. That made it kick off. I got gas, went back by my apartment, and down to an abandoned street. I drove around in second and down shifted to first and the jolt from down shifting make it cut out again. It sounds like a loose wire somewhere, but I still don't have a clue where to start looking.