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96 chevy s10 blazer no start

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  • #879287
    Richard brelsfordRichard brelsford
    Participant

      i have a 1996 chevy s10 blazer 4.3 vortec, its not starting under its own if u use starting fluid or gas in throttle body it will start and run just fine, i have change the fuel filter on it, and you can hear the fuel pump priming the system but all it dose it crank, i don’t know what to look at next

    Viewing 7 replies - 1 through 7 (of 7 total)
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    • #879296
      Billy AndrewsBilly
      Participant

        It may require more fuel pressure to start than to run, and the pump or regulator may be on the way out. A good next step is to get a fuel pressure gauge and check cranking pressure against specs.

        #879312
        Richard brelsfordRichard brelsford
        Participant

          Ok the truck has sat for 2 years after it hit a deer. What should I look for in fuel pressure

          #879330
          Billy AndrewsBilly
          Participant

            That would have been good information to start with. 2-year-old gas is not reliable fuel. I would pump/drain out all of that and put in fresh gas.

            #879341
            Richard brelsfordRichard brelsford
            Participant

              it has fresh fuel in it, I’m going to get a fuel pressure tester and see what the pressure is

              #879401
              DanielDaniel
              Participant

                If it hasn’t already been done upgrade from the CSFI spider to the later style MPFI one. The instructions on how to do so are readily available online.

                Sent from my LG-US996 using Tapatalk

                #883291
                Richard brelsfordRichard brelsford
                Participant

                  well i went and got a fuel pump for the truck and it ran fine for about 2 days and then it just wont start now, i cant hear the fuel pump running now, could it be a fuel pump relay

                  #883297
                  JamesJames
                  Participant

                    You have to start original pressure testing again. Find out if you have fuel pressure. Then if not, find out why not. It is not uncommon to get new after market fuel pumps that are bad.

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