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Quote:
Originally Posted by ERA Chas
It's probably a tapered needle and seat in the vacuum passage. Adjusting it changes the vacuum on the diaphragm.
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That' true, but it must be a bleed in parallel with the diaphragm. The venturi signal strength then gets altered since it doesn't require a spring change to alter the opening rate.
Here you can see the bleed off:
Quick Fuel Adjustable Vacuum ADV Secondary Housing 63 1 | eBay
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Gary
Gold Certified Holden Technician
Last edited by Gaz64; 09-24-2013 at 02:24 PM..
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