68 GTO vacuum question - Pontiac GTO Forum
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post #1 of 3 (permalink) Old 06-01-2007, 11:30 PM Thread Starter
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68 GTO vacuum question

Thanks for reading,,,I took my 68 out of a ten year storage after a complete restoration, I was checking the vaccuum lines which brought me to a question. Is the vacuum line from the transmission modultor valve supposed to go to the carburator vacuum port or directly to the intake manifold port. and does anyone know where I can get a scan or a link to show me a pictoral of the running of the vacuum lines for my 68 400CI I greatly appreciate any input you can give thanks Woody
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post #2 of 3 (permalink) Old 06-08-2007, 02:20 PM
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I'm fairly sure that the modulator should be connected to full-time vacuum. Doesn't matter if it's from the carb or the intake manifold, just don't get it from a timed vacuum port on the carb.
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post #3 of 3 (permalink) Old 06-08-2007, 07:30 PM
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If you are running the stock q-jet it runs to the 1/4" port on the front top passenger side.
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