Quote:

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Maybe a bad spot on one of the wires going to or from the box.

You mean power or ground to the MSD.? I will load test them tomorrow.

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You should be able to stick a pin in the hot lead
(big red wire)and see if you have 12+ volts...
do it close to the box with the engine running
EDIT
I was just thinking Jamie... the big red and the black
ground come on the box so that would be a waste to
test it there(at the box) so test it where you hook
the red lead up at