Alex Longpre

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  • in reply to: Can an Oscilloscope be my only diagnositic tool ? #114537
    Alex Longpre
    Participant

      Unless you buy an amp clamp, you will not be able to read amps with an oscilloscope. Neither does it read Ohms. Only reqds voltage over a time-base

      What you might have seen is that Matt has the Snap-On Vantage Pro tool. It is a combination of a digital/graphing multimeter and a 2 channel oscilloscope, along with a built in database/diagnostic help program.

      You might want to look into that, they are pretty affordable on the used market.

      in reply to: MB w212 v6. Misfiring cylinder 1; OK after restart #22016
      Alex Longpre
      Participant

        I was asking this because I’m a Mercedes dealership technician and one thing that I see happen now and then, is that when the car has been sitting for a while, the ME seems to lose trace of some of its injectors for a reason nobody seem to understand and then cuts power to that injector. The car then runs like cap and CEL stays ON until the car is restarted, then the problem goes away.

        But 10 hours is too short of a downtime for this to happen.

        The leaky injector scenario described above is not out of the question, we see that from time to time.

        in reply to: MB w212 v6. Misfiring cylinder 1; OK after restart #21707
        Alex Longpre
        Participant

          Does this happen every time you start the car or only if the car has been sitting for a while?

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