I hope that's all it is -- but it made sense that using the ADAPTOR giving the TACH an 8 cylinder signal -- that it would read double with it (the tach) set on 4 cylinders.
My question was - in that case - why do you need the adaptor - if you could just set up the tach with 4 cylinders selected..... That's why I read it twice - to see if I missed something there...
Hope that's all it is - but it looks like that's the mismatch.
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