Fuse 8 is for the starting system and the ignition switch. I suspect you have a short in the ignition switch or the starter. So I would suggest disconnecting the wires on the starter and then put a new fuse in. If it pops again then replace the ignition switch. If it does not then you have a short in the starter solenoid and you need to replace it.
https://www.2carpros.com/articles/how-to-replace-a-starter-motor
The reason the engine is shutting off is because the fuse blows and the PCM loosens the key position. On these older vehicles when the PCM loosens the key position it shuts the ignition off.
Please see all the info below on what was covered above.
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Thursday, July 15th, 2021 AT 6:14 PM