Quote:
Originally Posted by Bentwheelbob
the air inlet thermal vacuum sensor is normally closed, but both nipples on the bottom of the sensor are on the closed side. Pull a vacuum on one nipple of the sensor and it moves through the sensor and creates a vacuum on the other nipple as well. Put heat on the sensor and the sensor opens up on the top side of the sensor (that part on the interior of the air cleaner) and releases the vacuum. Once the vacuum releases it lets the flapper doors open.
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So once it opens up, and lets the vacuum out, it is a controlled vacuum leak... Got it now. Never checked mine, I always thought it allowed vacuum when cold and closed when warmed up stopping vacuum to the actuator.
Still trying to locate where I found the colored hose information.