Yes.
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The secondaries won't open if you are doing it with the engine in neutral or park. The engine needs to be under load for that to happen. If you are trying to get the secondaries to open while driving the car then the linkage needs to be cleaned and checked for binding, the diaphragm is dry rotted/cracked/has a hole in it, or the spring might be too heavy for the vacuum to overcome.
...Ron
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68'RS Camaro 88'Formula 00'GT Mustang