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The 3.8L engine found in some years and models of Buick cars uses a throttle body to regulate the amount of air flowing into the engine. This throttle body has a butterfly valve on the front which is opened and closed with the throttle cable. The throttle body needs occasional maintenance, including cleaning and lubricating the linkage. To do this, you can remove the throttle body from the engine, which should take about an hour to do.
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