Re: mine did that and I........... - Saab 900 Bulletin Board - Saabnet.com
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Re: mine did that and I...........
Posted by MS (more from MS) on Wed, 21 Aug 2002 03:50:47
In Reply to: mine did that and I..........., Speed, Wed, 21 Aug 2002 03:00:16
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The part you refer to under the dash is called the pressure transducer. It monitors pressure within the intake manifold and sends that signal to the APC control unit which also receives info from the knock sensor. Based on the input from those two items the solenoid is pulsed open and shut (clicking) to relieve excess (or sudden) charge pressure within the intake manifold by way of reducing exhaust side pressure through the wastegate. Less spinning of the turbo turbine wheel means less intake manifold pressure.
posted by 64.12.96...
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