No electrical power on my 930, help

[accel]

Hey I'm new here. I got my 79 930 about a month ago and now having more problems. For the last few days my car wouldnt start after being driven. In the morning starts right up but after driving it doesn't want to start. Sometimes (2 out of 5 times) if I dissconect the postive battery cable and hook it back up it will start. The starter is brand new so I know it couldn't be that. Earlier it wouldnt start so I dissconected the battery again but this time when I put it back on and tried to start it, it started up but died and now there is NO electrical power. No lights, no sounds, nothing. I thought maybe the battery died but battery is full. Also earlier when the car was running I was checking the make sure a vaccum line I replaced wasn't leaking and I touched the coil with my hand and it shocked me. Not sure if that could have done anything. Now I have no idea whats going on. Im taking it to the track this weekend but now I have this problem. Anyone have an idea what it might be? Thanks

[MXMARK]

Hi, Welcome to the board. Maybe a bad ground. or bad battery. Check the ground cable where it mounts to the body, the ground cable and the terminal. Check all ground locations. I say bad ground. I could be wrong. Thanks Mark