| Re: [GMCnet] air cleaner sensor leaks [message #324795 is a reply to message #324712] |
Tue, 10 October 2017 11:50  |
drdonaldg
Messages: 35
Registered: June 2013
Location: San Rafael, CA
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Jack, for the CA smog test the vacuum motor and temp sensor is just a visual inspection. My vacuum motor leaked so I blocked the vacuum source so that there was always cold air to the intake. On our trip to Alaska there were some cold mornings where it would take awhile to warm up so I decided to repair the system. I replaced the vacuum motor and the temp sensor so it works as designed. When the temp sensor is warm and the vacuum motor is in cold air intake position the temp sensor does leak a small amount of air into the vacuum source. There is a restriction in temp sensor to limit the air flow and because the sensor is in an area of lower pressure the amount of vacuum loss is insignificant.
1977 Palm Beach
TZE167V100274
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