1991 Buick Century Q&A

1991 Buick Century Question: changed fuel pump.filter.ignition mod.and crank sensor.starts but stay running

the car starts but will only run about 10 seconds then dies.replaced fuel pump and filter.i have 32-34 lbs pressure running and 42-44 not.replaced ignition mod still same thing..towed it to gm dealer for diagnostic and their suggestion was crank sensor so i replaced that also with no change.spray ether direct into throttle boby and motor will keep running.no codes on computer...im stumped on this -
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