My last attempt at fixing this, before I throw it away!

I bought a second Ender 3 to compare settings, setup, hardware, etc.
All menus are the same. The identical files are being used. Same PLA brand.
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The printer on the left has had the following upgrades, but STILL JAMS!!!
- aluminum feeder
- feed tubes, fittings, and locks
- circuit board (quiet drive)
- heater, and nozzles
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After a random period of time, the OLD, UPGRADED printer jams at the hot end
and creates a wedge that is very difficult to remove.
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I've tried temperature changes, feed speed, and equaled the following settings:

MAIN:: CONTROL :: MOTION >
A-Travel from 1000 to 500
Jerk 10 to 20
Jerk 10 to 20


How and why is it still jamming? I will literally send a million virtual hugs to anyone that
lead me down another path to success. I'm at a loss...

Thank you in advance!