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91 s-10 truck

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    Topic
  • #440426
    tommytommy
    Participant

      I have the 4.3 tbi engine. the check engine light came on, it started runnin rough with a high idle. i changed the plugs,wires,distr cap & rotar. it ran good till i got back, now its runnin rough & high idle again, & hard to start. I need any & all advice PLEASE!!!

    Viewing 9 replies - 1 through 9 (of 9 total)
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    • #440427
      3SheetsDiesel3SheetsDiesel
      Participant

        I’d check for vacuum leaks. Possibly the lower intake manifold gasket, possibly one of the many vacuum lines. Hard to really say.

        #440428
        Trcustoms719Trcustoms719
        Participant

          Is the check engine light on now?
          If so have the code(s) read and post them for us.
          Thanks.

          #440429
          BigCBigC
          Participant

            +1 for 3SheetsDiesel. Keep in mind that you might have a vacuum hose that leaks (more noticeably) once the engine compartment gets hot. As Trcustoms719 indicated, let us know if you have any codes. Keep us posted.

            #440430
            LudstoysLudstoys
            Participant

              I suggest injectors. watch this. http://youtu.be/iv8n0ddcsZU

              #440431
              Trcustoms719Trcustoms719
              Participant

                Sounds more like a vacuum leak to me.
                I don’t think a bad spider injection system will make it idle high..W;)

                #440432
                dreamer2355dreamer2355
                Participant

                  We need the check engine ligh codes to help you diagnose this further C8-)

                  #440433
                  MattMatt
                  Participant

                    Quoted From Trcustoms719:

                    Sounds more like a vacuum leak to me.
                    I don’t think a bad spider injection system will make it idle high..W;)

                    He said it was a throttle body. There is no Vortech spider injector involved here…

                    #440434
                    EricTheCarGuy 1EricTheCarGuy
                    Keymaster

                      Yea if you still have the code then we will need that to help you further as that is your most important clue to what the problem is.

                      Eric

                      #440435
                      Trcustoms719Trcustoms719
                      Participant

                        Quoted From Beefy:

                        He said it was a throttle body. There is no Vortech spider injector involved here…

                        Oh..crap, thinking of the wrong year here.
                        Sorry about that guys.

                      Viewing 9 replies - 1 through 9 (of 9 total)
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