You need the anti-icing even in the midwest. - Saab Performance Bulletin Board - Saabnet.com
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You need the anti-icing even in the midwest.
Posted by JohnB (more from JohnB) on Sun, 7 Aug 2005 14:54:59
In Reply to: throttle body, damien, Sun, 7 Aug 2005 11:19:21
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arctic hasn't got anything to do with it.
On humid mornings, even at 50F, an almost closed throttle (and all saabs idle at virtually closed throttle!! IAC controls idle speed) can lead to icing, or rather freezing of water vapor as it cools going past the almost closed throttle which acts as an orifice/pressure restriction. The high/low pressure drop across the closed throttle acts just like an expansion valve or orifice or tube in an AC unit and voila....iced throttle. Also, the random cloud of vaporized petroleums wafting around in there can also condense and freeze the throttle. The throttle then can stick and the car doesn't work very well with a throttle stuck shut.
posted by 69.138.19...
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