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ignition issues on 1997 Chevrolet S10

I have an s-10 that runs for about 5-10 seconds and then shuts off. I have checked the fuel pressure and it is at about 50 pounds so I know its not fuel. could it be the ignition module or something electrical?

Asked by for the 1997 Chevrolet S10
it is the fuel pump. the pressure needs to be 58-62 lbs. i am surprized it runs with 50 lbs.

Roy
are there different fuel pressure settings for the same 4.3litre engine in a different vehicle say an astro van with the same engine?