i thought the same thing and i thought it would work too, so i went and bought 2 vacum gauges and tried, i just did this 5 days ago. it doesnt work, at all. when i hooked them up to check the vacum, the needles in the vacum guage was bounceing all over the place, there was no possible way to even read where the needle was, it went from positive 25 to negitive 6, back and forth so fast, when u reved the engine to like 10k then the needle would calm down a little and only bounce back and forth between 5 psi and 10 psi. i cant give u a scientific definition but i can tell u it dont work at all.i hope this helps.
but if anyone has a sync tool they want to sell for cheap or let me barrow for a few days let me know, im in wisconsin. thanks
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