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How To Diagnose Common Engine Problems With A Vacuum Gauge

By: Bill Tichenor12/02/2009 < Back to Blog Home
How to use a vacuum gauge on a carbureted engine to diagnose problems like a sticky valve, ignition component problems or too much advanced timing, a dirty air filter, vacuum leaks, worn piston rings, improper cam timing, rich or lean mixture, and more. More information is located on Holley's website: http://forums.holley.com/entry.php?429-How-To-Adjust-The-Idle-Mixture-On-Holley-Carbs