Michael Coman

How to Check Your Advance and Retard Vacuum Pipe

Michael Coman
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The vacuum advance is key to the good running of the engine. If the pipe or diaphragm are leaking, the engine will run poorly.

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One Response to “How to Check Your Advance and Retard Vacuum Pipe”

  1. Ian Williams

    My car was overheating. I tried this test using a vac pump. It wasn't moving the baseplate inside the distributor when suction applied. Also I manually moved the plate across, covered the end of the tube but it didn't stay in place, so I am suspecting the vac advance unit. .

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