Thread: Low Vacuum in 390
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11-05-2009 01:15 PM #4
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vacume to the modulator should be straight manifold vacume not carb venturi vacume. If thats correct I would measure vacume at the modulator end of the vacume line,maybe it has a leak in the line or it may be restricted.Last edited by HWORRELL; 11-05-2009 at 01:33 PM.
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