1997 chevy fuel pump problem?????

[mike65648]

I have a 1997 chevy 4x4 w/a vortec 350. my problem is after the truck sits overnight or for 8 hrs sometimes it does not want to start. this does not happen all the time....maybe 1/2 the time. sometimes in the morning i will go to work and it will start fine...but other times it dont. i took and poured some gas done the injector and it does fire and i can get it started like that. so i know it has no ignition problems. i have changed the fuel filter...didnt seem to help. i have never had it die going down the road. i can hear the pump running at times. what could it be? is there a regualtor on the truck? if so where? im sure its not the relay?? what else could it be??thanks

[LastOne]

Bet you your fuel pump asm is going out. Mine did same thing. Get someone to crank the truck while you beat on the gas tank with a hammer. If it cranks, your pump is going bad. It is in the fuel tank.
Good luck

[Danielswan]

you need to buy a fuel pressure test guage, you can get them a a local parts store for about 30 dollars, 60-66 psi. it should always stay within this range,the guage and the book for 20 dollars you can diagnose anything in the uel sending system. i highly recomend this as it has saved me lots of money and headaches over the years, btw the test guage will fit almost all fuel injected vehiclesso it is a good investment.