Quote:
Originally Posted by LJ851
I guess I could have asked my question more specifically. Does the coil output all the sparks it is supposed to but the sparks don’t continue downstream ?
If that is not the case , is the MSD box is getting 12v while you are cranking ?
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OK, I got busy this morning.
First, the signal at the green wire looks good, see the trace below:
Second, the voltage to the CDI box is 13.1V at rest, which is fine.
But when I crank, the voltage drops to 10.5V, which may be too low for the CDI box?
Also, if I trigger the CDI box with the white wire, I get a spark at the coil, but if I crank, I get no spark at the coil. This also suggests the voltage to the CDI box is too low when cranking.
So maybe a bad ground is causing too much voltage drop when I crank, or maybe the battery itself is bad, but it cranks the engine with no issues. At least, I think the distributor is not the source of the problem.