Vacuum advance check

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dpm

Member
Posts
46
Tried searching but cant find any advice on how to check the vacuum advance with it off the distrbutor . If I suck on the stub that the pipe attaches to, there is no resistance I can just keep sucking air, does this mean the diaphram is split? Likewise if I blow I can feel a small amount of air coming from where the arm comes out.
 
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