98 S10 blazer runs and then dies

[Billy J]

when the motor is cold it will run until it warms up and then dies, it will then crank and run for a few min then dies. I have changed the coil and the module but still dies. there is no codes... I unpluged the temp sender and it sets a code so I know the computer is reading. Does eneyone have info on this ? I realy need help ..thank for your time.

[Billy J]

I changed the fuel pump and so for all is well $200.+.. thanks for the help.

[Rick Norwood]

Originally Posted by Billy J

I changed the fuel pump and so for all is well $200.+.. thanks for the help.

Glad to hear you got her running again.

It is a little rare that the engine would run for a while then die, and turn out to be a bad fuel pump. Usually a bad fuel pump will not start the engine at all or die on you without warning, but once they die, they're usually toast and won't start the engine again.

Please be so kind as to tell us how you diagnosed the bad fuel pump and elaborate on your experience.

Thanks for posting back.

[Billy J]

when the truck was running I pressed the valve on the fuel rail and the fuel barley came out, plus the pump was real loud. With the new pump when I pressed the valve on the fuel rail the fuel sprayed out and the new pump was real quite. I had no pressure tester. So for all is still well.

[evo-00]

I've relaced a few airtex pumps that do this. I think the fuel pump motor gets hot and quits working. It cools down quikly because it's submerged in gasoline and will run again after just a few minutes. The pressure will test fine at first but if you test it right after it dies you'll find the pressure is too low.