Quote:
Originally Posted by ujiro
How can I tell that the valve knocker is functioning properly?
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By installing the one you had installed when the gun was last known to work.
If you re-install the old one and all of a sudden, your gun starts working.... it's not magic as to why it's working again, right?
If you never changed the valve knocker, then that's obviously not the problem. Go through each of the parts you installed between the last known configuration till when you found out it wasn't working anymore, each component one by one to find the source of the problem. It's simple deduction.
It's also time consuming and a pain in the butt, but if you want your gun to work, it's what you have to do.