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  1. Grayscale

    1976 FJ40 2F Semi Transistorized Points Igniter…Dwell measurement?

    My understanding is that dwell regulates the duty cycle of the coil. Like, it takes some time (rotation angle) to build up voltage, and so much rotation angle to discharge it for igniting the flame-front. If you get that in spec, then you make the most of every spark, in theory. With it off...
  2. Grayscale

    1976 FJ40 2F Semi Transistorized Points Igniter…Dwell measurement?

    I think that carrying a multimeter in the vehicle is more important than carrying jumper cables. It is best to just get a fresh battery because modern vehicles might not handle the spike in voltage when you disconnect, that is why they say run all electrical accessories while you disconnect...
  3. Grayscale

    1976 FJ40 2F Semi Transistorized Points Igniter…Dwell measurement?

    Did you get the dwell back to spec? And, does having correct dwell reflect a points gap that is more or less withing factory numbers? In other words, can you discern any distributor cam wear?
  4. Grayscale

    1976 FJ40 2F Semi Transistorized Points Igniter…Dwell measurement?

    I installed that distributor about six thousand miles back. It was the earlier one that CityRacer offers. I wonder how far off you have to be with just setting the points with a feeler to have an impact on dwell? I recall that distributor cam wear has been described as a factor that can help...
  5. Grayscale

    1976 FJ40 2F Semi Transistorized Points Igniter…Dwell measurement?

    I just did a dwell check in the rain, almost snow. It says that my factory points that have never been touched have a dwell angle of 42 degrees. I did the COM lead to battery negative and the red lead to the negative post on the ignition coil. I failed to get a part number for the igniter...
  6. Grayscale

    1976 FJ40 2F Semi Transistorized Points Igniter…Dwell measurement?

    Maybe it is the igniter that is giving you the issue? If you reinstall a capacitor on the distributor, and bypass the igniter, you might have what is needed to check dwell. The Haynes manual describes the hack, which is really odd for a repair manual that includes emissions info. I'm pretty...
  7. Grayscale

    1976 FJ40 2F Semi Transistorized Points Igniter…Dwell measurement?

    Technical specs on mine call for the tool to be used at 64 to 82F with accuracy. Standard operation is from freezing to Phoenix at night.
  8. Grayscale

    1976 FJ40 2F Semi Transistorized Points Igniter…Dwell measurement?

    Humm, my HarborFreight CenTech manual also has an induction signal pickup for high tension lead to a spark plug, different paper, same box. The signal pickup is for dwell and rpm...
  9. Grayscale

    1976 FJ40 2F Semi Transistorized Points Igniter…Dwell measurement?

    Which input jack on the multimeter for the red/coil negative lead?
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