How to do a vacuum test?
Elder User
Joined: Oct 2005
Posts: 677
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Get a vaccum guage.... you can get one at an auto parts store.
Locate a vaccum line that provides full vaccum at idle, off the manifold, or base of the carb and plug the vac line into the port.
Read the meter. You can also read it when driving too if you use a long enough hose to get through the firwall.
Look for 14-20 at idle. It really depends on the cam. What cam ?
Locate a vaccum line that provides full vaccum at idle, off the manifold, or base of the carb and plug the vac line into the port.
Read the meter. You can also read it when driving too if you use a long enough hose to get through the firwall.
Look for 14-20 at idle. It really depends on the cam. What cam ?
