Quote:
Originally posted by DSMChick@May 24 2004, 12:14 PM
Tell me how they work? (continuing from previous off topic thread)
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Blow off valves are simply valves that release pressure between the turbo and the throttle body. They are activated by vacuum, negative pressure in the intake manifold. This vacuum happens when the throttle is closed, and the engine is sucking air in faster than the throttle body is providing it. When vacuum is created the blow off valve (BOV) opens. Under normal circumstances the BOV should never open at idle. If it does certain things must be done so that the car operates properly.