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Q: Why does my 1999 grand prix keeps shutting off? on 1999 Pontiac Grand Prix

Begining late june this starting happening, my car would jus shit off while driving since then i have replaced spark plugs, wires, ignition control module, all three coils as well as cps and a new harmonic balancer balancer simply because old one was broke still keeps happening im at a loss and it throws no codes please help
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