Vacuum Connection Location
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Cross-Country
Joined: Feb 2023
Posts: 54
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From: Vista
Vacuum Connection Location
Looking for advice on best configuration for hooking up brake booster and vacuum modulator on Edelbrock 390 intake manifold. Currently both tee off rear of Edelbrock carb base. It works but wondering if they rob vacuum from each other. I have slightly soft brakes. Would the connection to the port on #4 runner be better for one or the other?
Fleet Mechanic
Joined: Dec 2016
Posts: 1,255
Likes: 698
Yes. Both should have full manifold vacuum, however less vacuum not usually the cause of soft brakes. Typically that would cause a hard brake pedal. Maybe need to adjust shoes or bleed lines.
Last edited by AZSCAWPION; Oct 4, 2025 at 09:34 AM.
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