TPS / MAP Sensor issues

[RBishop85]

Vehicle: '96 240sx SE Auto

So I'm trying to troubleshoot a TPS check engine light and some acceleration issues I'm having that I assume are related to that sensor.

About a month ago I had my alternator go out and at the same time I started having issues with my acceleration, most noticeably from a stop or at higher speeds, mid speeds (20-50) seemed to have decent acceleration although not great.

Anyways I didn't realize there was an alternator until my battery died for the first time a week later. I just got that repaired last week and I'm still having the acceleration issues so I've been looking at the sensors. I'm getting check engine lights for both the MAP and TPS sensor although I've been told the MAP could just be showing faulty because of a TPS issue.

I performed the continuity test on the TPS and it appeared to be ok, roughly .5 when closed scaling up to 4 when fully open with no noticeable dead spots or erratic behavior. So from here I moved to testing the harness.

When checking the voltage on the lead wire I read that it's supposed to be approx 5V but I'm getting a reading of 6.3V which at least to me definitely seems pretty high. Also maybe my understanding on this is wrong but shouldn't the signal wire going back to the control module show no voltage when unplugged from the sensor? It was fluctuating between 4.5 and 5V. I also checked the same things on the MAP sensor harness since they seem to be connected and it also showed 6.3V on the lead wire but a 0V on the signal wire.

Is this a sign of a wiring short of some form or am I just really coming at this from the wrong angle? Any input would be greatly appreciated since I really don't know much about automotive mechanics or electrical and I want to get my car back up and running properly without paying a mechanic hundreds of dollars.