Starts, runs for about 5 sec, and then quits. any

Maybe this will have some additional info. You commented it shuts down after 2 seconds this says shuts down 5 sec may have something.
https://www.repairclinic.com/RepairHelp/How-To-Fix-A-Microwave/283-5--/Whirlpool-F6-Shorted-temperature-probe-will-occur-if-temperature-probe-is-detected-as-shorted-continuously-over-5-seconds

https://www.repairclinic.com/Video/Video-Landing/637-6/How-Does-a-Microwave-Work-Appliance-Repair-Tips

If your engine light is on, check for codes. Sounds like fuel pump relay.

This sounds like you may have an ignition module failing. Run it and when it dies, have some one crank it while you check for spark. If no spark is found, replace the ignition module. This piece runs about $75. Not too bad relatively. Let me know what you find.

check fuel filter/ spark plugs and wires

1) Fuel filter,2) Fuel pump

sounds to me like your check valve in fuel line is not working. If you have the original lift pump it located in there.

It seems to be a problem with the crank shaft sensor causing it quitted while driving. Having the 2008 model, you still have warranty. Let have a dealer diagnose the problem and replace the part under warranty. Cheers.

is the security light blinking on the dash? you need to try the security relearn.

• disconect batrtery for 20 seconds. reconnect it.
• try to start car, let it die, leave key on for 10 minutes or untill security light stops blinking
• turn key off for 5 seconds

that somtimes will will do the trick. if not try the procedure again.
hope this helps

call a locksmith you need to get the car keys reprogram to be accepted buy your new car computer here is a link to help you understand what is going on

click here

you should have power on the tan wire for about 5 seconds with key on try to cycle key on for 5 sec off for 10 sec if no power chehave power on both sides of fuseck ecm 1 10 amp fuse if you check ecm b fuse if that is ok check for power on the orange wire and power on the green with white wire on fuel pump relay if you have power on those check for power on the grey wire out to fuel pump if you have power on grey wire you have a bad wire from the grey to the tan wire some where in the harness hope this helps