MSD coil testing
Well, I went out to crank my trucl today and discovered that I have no spark.
So I did a little testing...
Tested battery voltage at battery: 12.6 volts.
Tested power lead to HEI: 12 volts
Pulled off dist. cap and thoroughly cleaned it (lightly sanded contacts throughout). Reinstalled it.
Still no spark
Pulled coil out of cap and did some more testing...
With a DVOM, I tested for resistance between the red and black leads for the coil . Got a reading of OL.
Tested between the yellow lead and black lead. Reading of OL
tested between the yellow and red leads. Low resistance (less than 1 ohm).
I have tried to find an exact testing sequence for the MAD coil and have yet to find one.
I fear the coil has died.
Shouldn't there be a reading between the red and black other than OL?
What about the yellow and black?
shouldn't the reading between the yellow and red leads be OL instead of less than 1 ohm?
also, if anyone happens to know NAPA's part # for the MSD in cap coil for a GM hei it would be greatly appreciated. There is a NAPA warehouse 5 minutes away and I bet they probably have it, though te guy answering the phones seems to have no clue.