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1997 chevy z71 sputters when accelerating

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  • This topic has 8 replies, 5 voices, and was last updated 12 years ago by PatPat.
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  • #483158
    cody james coopercody james cooper
    Participant

      i have a 97 z71. when driving it sputters when accelerating. i can hear a popping noise from the exhaust. the truck has new head gasket, fuel pump, fuel filter,and a crank postion sensor. my plugs are white and i can smell the exhaust fumes really bad. what is wrong with my truck. please help me.

    Viewing 8 replies - 1 through 8 (of 8 total)
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    • #483188
      college mancollege man
      Moderator

        check your mechanical timing.

        #483350
        cody james coopercody james cooper
        Participant

          how do i do that. im not a idiot i just dont work on trucks. im a motorcycle mechanic. thanks for your help

          #483372
          college mancollege man
          Moderator

            here is a video that is universal.

            #483397
            Logan JohnsonLJ11194
            Participant

              Do you have a misfire code? How old are the plug wires? Timing is more likely, but those are easier to check.

              #483422
              cody james coopercody james cooper
              Participant

                i got a p1345 today. iam not sure about the plugs wires. probably never been changed. i found a plug with to wires on the passenger side at the front of the engine the wires are right by the crank shaft sensor. where do they go. i looked everywhere

                #485352
                EricTheCarGuy 1EricTheCarGuy
                Keymaster

                  Misses under load like that are often ignition related. You might want to check for voltage leaks particularly with those wires you spoke of.

                  #486235
                  PatPat
                  Participant

                    would it be possible to get a picture of said 2 wire plug? i havent looked under the hood of a chevy truck since the 80’s or i may be able to help u better. “love z71’s as a side note”. Anyways. the only thing i could suggest is to run the wire to its length and see what is there. for instance. if it has been plugged in a long time and has been unplugged or knocked loose during previous repairs it should lay a certain way. “kindof like it wants to go in that direction” so look how it is layin and check for a plug. i think your map plugs in on top of your manifold. but other than that i dont know where to tell you to look. a picture would be helpful. Of the plug and the general area where it is found. Hope my words can help u in some small way. have a good one.

                    #486241
                    PatPat
                    Participant

                      Also on these trucks i think you need to do a crank position sensor relearn, whenever u change the sensor. read something about it looking for info on what that plug could be. :cheer: dealer can do it with a computer if there is no manual way to make the truck do it. Maybe in the FSM. good luck

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