1998 Plymouth Voyager Won't start

After leaving the transmission shop, it ran fine for 8 miles. Then it died at a stop light. No Engine light. Before it died the oil light flashed twice then it stalled. Then it would crank once then nothing, until it sits for a an hour then crank once then nothing. Good battery & connections, no starter solinoid chatter, fuses good too. I can hear a relay when I turn the key. Don't know if it has a theft system (pretty basic car).