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Vacuum gauge diagnostic

   
Old Oct 12, 2019 | 02:40 PM
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Ehamilton's Avatar
Ehamilton
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Vacuum gauge diagnostic
I have a 1969 318 engine. My vacuum reads between 17-21 moving rapidly. Steady outs and increases with acceleration.
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Old Oct 12, 2019 | 03:09 PM
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RacerHog
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Those are good numbers...... Fluctuating rapidly back and forth would tell me the engine my have a weak cylinder and to perform a compression test.
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