My samsung will shut off seconds after starting and show code 6302nd or bE3

Did you reprogram the anti-theft? That's what this sounds like

you can get guide from many sites.. i know few
error codes/ fault codes, wiring diagrams, schematic diagrams, torque specs, engine info, switches functioning, assemble, disassembly, complete refurbish, repair, installation every sing le thing is covered
within seconds u can get the access and it's totally illustrative complete

have scanned for the trouble codes vehicle is shutting down as a safety

Replace the map sensor.

check the remote battary

dies it have IMMO???? the IMMOBILZER?
id the light glowing, saying IM UNHAPPY?
1st google hit, of 6000 says SKIM failure.
been swapping major electronics ?
i see you left out the full story.
i did X and not SKIM is unhappy// what is X?

the FSM covers this, read the FSM>
or goggle Jeep SKIM

Smart Key Immobilizer Module = SKIM

try to charge the battery or have it tested

remote start might need reprogrammed check for codes in system security code may have set

Is the security light flashing? It sounds like a problem with the security system.

Yes you can no problems as such ,just make sure you have the same size spigot shaft ,if not then use the clutch from the donor vehicle