Today it was 48 degrees and sunny out in MN. No snow or therefore salt, so I fired up my 55 Chev and went for a ride. Came home and looked at the Pontiac air cleaner and flaps in snorkel open. Fired it up and they stayed open. Went for a ride as an end of year bonus. So, I assume it may be a bad thermal sensor. Or, could both vacuum diaphragms be bad?
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