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stops running after 20 / 25 minutes on 1991 Buick Century

I have had the maf , crank sensor , ignition module , coil packs , and fuel pump checked an they all tested in good even replaced the ecm

Asked by for the 1991 Buick Century
this sounds like an infamous fuel pump issue. no way for the computer to detect no fuel flow. so do a pressure test, and turn key to run. do not start the engine and hear for a buzzing noise. it should last a few seconds. these codes together on this year is often fueling issues oops posted in wrong spot. sorry
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this sounds like an infamous fuel pump issue. no way for the computer to detect no fuel flow. so do a pressure test, and turn key to run. do not start the engine and hear for a buzzing noise. it should last a few seconds. these codes together on this year is often fueling issues oops posted in wrong spot. sorry