Geo/Chevy Tracker Forum

I have been lurking here for a while but this my first post
I own a 1999 Chev tracker 1.6l manual 16 valve 4x4 2 Door, total mileage 70,000.
The number 3 cylinder had a burnt valve that I replaced
Took it for a 3 mile test drive on Saturday and everything worked fine
Drove it for 10 miles on Sunday and the engine just quit, tried to restart it but got no response.
Tow truck driver tried to jump start it but it was dead
Took it home and it started and ran normally for 1 or 2 minutes and then just petered out and died.
Now I get no response, there is no spark, sprayed gas into the intake manifold while cranking but not one pop.
There are no codes on the ODB2 scanner
Where do I start looking for the problem?
Thanks for you help