Not likely OVP, very likely Fuel Pump relay - as Mick J says - it's a common problem.
If you're inclined, do a little searching on this forum and you'll find out where the fuel pump relay is and what it looks like, and you can open it up yourself to check for broken joints, which are usually the problem. I did around a year ago, resoldered them (easy job), and my random stopping problems disappeared.
Or buy a new one, they're not tooo expensive.
I'd put money on it fixing your problem.
2.5-16v 1990 90,000m Astral Silver
2.0E 8v 1986 107,000m Black