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
1 answer
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