Quote:
Originally Posted by lr172
How do you KNOW the plug is not the problem? Did you confirm 1K resistance?
Larry
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Thanks everyone for the advice.
So to recap: Actions thus far,
Test run showed an EGT drop in #3 cylinder when LSI turned off.
I removed the #3 plug and installed a new plug. No change.
I switched the #1 and #3 plugs (I know the #1 was functional) No change. So I know the #3 plug was functional when swapped to the #1 cylinder.
I proved the engine monitor's #3 reading was indeed relating information from the #3 cylinder.
I switched out the harness to a known functional harness. No change.
Fortunately I have a spare mag on the shelf. I'll install it tomorrow.
Considering the steps I've taken, I've got to conclude that it's an internal malfunction in the mag.
Additional suggestions are still welcome. I'll post the results of the mag switch tomorrow after the work is done.