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my car is in limp mode. need help

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  • #957328
    __T__ __C__Robert Clark
    Participant

      hey guys, i got a problem here.
      95 pontiac grand prix with the 3.1 engine.
      it has gone in limp mode. and i cant pull codes, its the obd 1.5

      i have replace
      spark plugs
      spark plug wires
      fuel filter
      map sesnor

      those havent fixxed anything.

    Viewing 7 replies - 1 through 7 (of 7 total)
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    • #957329
      Nightflyr *Richard Kirshy
      Participant

        Unfortunately, your taking shots in the dark with the parts cannon.
        You will need to pull any possible codes to give some kind of direction to lead to a repair.

        #957330
        __T__ __C__Robert Clark
        Participant

          forgot to add, that the car will only go into 1 and 2nd gear and wont go pass 50mph.

          #958310
          __T__ __C__Robert Clark
          Participant

            replaced
            air filter
            fuel filter
            tps
            idle control
            egr
            camshaft sensor

            still wont go pass 2nd gear.the car struggles to gain speed

            #958336
            Eric LambousyEric Lambousy
            Participant

              What did the plugs look like? What was the result of the testing you did to see if each cylinder had spark? What was the fuel pressure? Is there any engine coolant in the reservoir? What is the oil level? Are there any fluid level sensors? Did you test the vehicle speed sensor?

              #958469
              __T__ __C__Robert Clark
              Participant

                levels are good.
                all cylinders have spark (bright blue)
                spark plugs were clean( no oil or coolant)
                fuel pressure is 41 at idle.really cant test going down the road
                and i have change the vehicle speed sensor.

                it idle fine,starts right up. rev fine.

                #958528
                __T__ __C__Robert Clark
                Participant

                  check fuel pressure again. this morning and its below 41 psi its around 35pis and car is running like crap

                  #958603
                  Eric LambousyEric Lambousy
                  Participant

                    35 psi may be too low for the engine to run. Find out what the psi is supposed to be and compare the reading you got. Dont replace the fuel pump before you test the pump and verify that the fuel pump is getting 12 volts of power and has a good ground.
                    Always check the circuit for power and ground on electronic parts’ circuits because if there is a poor electrical connection or a broken/damaged wire, you will end up replacing a part that is in working order.

                  Viewing 7 replies - 1 through 7 (of 7 total)
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