I'm back at it again
Cleaned the battery posts real good and cut more ventilation in my enclosure. So far it seems to be a lot more stable. It rebooted one time for sure, possibly more. I may cut more ventilation holes in the enclosure. If that doesn't do the trick I'm going to install a power filter to smooth out the dips/spikes.
The only problem now is that I think I shorted out the VSS in my gauge cluster while testing stuff with the multimeter and now I have no speed signal. Doh!
It was kind of irritating using the sensor off the combination meter anyway because it didn't put out a signal when the key was off. I'd like to get an aftermarket sensor that runs even with the car off. But I may create a new thread if I can't find any similar posts.
Thanks everyone! You guys are great! (Especially dcb!)