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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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#14073 01/01/2004 6:07 PM | Joined: Mar 2000 Posts: 1,177 Red dot, center of chest ... | | Red dot, center of chest ... Joined: Mar 2000 Posts: 1,177 | I believe you can disconnect the lever arm from the vacuum advance and operate it by hand. By doing that, you could test whether or not the mechanical parts of the advance are operating as expected.
You can also disconnect the vacuum hose from the advance, attach a rubber hose to it, suck through it and see if it holds a vacuum. (Or use a vacuum tester if you happen to have one handy.) | | |
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