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Manifold Vaccum - 390 V8
I was checking the manifold vacuum to the transmission vacuum modulator with a vacuum tester. At idle speed, the manifold produces 17" vacuum and at higher RPM's, about 21". Does anyone know if this range is within spec?
Only thing I could find in the TSM about vacuum is that the modulator rod should retract fully at 18" vacuum. Car is a 69 AMX, 390 ci. Thanks in advance.
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