First, after your comfortable with the full charging of your (new) battery, you or AutoZone need to take some voltage reading across that battery.

At rest and engine not running, it should read at 12.5 volts or slightly higher.

With engine running it should read 14 volts or slightly higher to show correct Alternator charging.

If your okay that the battery and charging are good, then check out this link on the Mystery No Start:

https://www.crossfireforum.org/forum...-no-start.html