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Re: vacuum line question .. no vacuum?
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Posted by Gene N [Email] (#1094) [Profile/Gallery] (more from Gene N) on Thu, 29 May 2014 04:26:46 Share Post by Email
In Reply to: Re: vacuum line question .. no vacuum?, FUEGO, Wed, 28 May 2014 23:03:59
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If you look under the main engine connector (the one with the plastic cover), you will see a solenoid vacuum valve. That valve controls if the bypass valve gets vacuum. My guess is that it allows the Trionic T-7 system to better control when the bypass valve is open. Earlier cars, like the 9000 I am familiar with, directly connect the bypass to the intake manifold. If you were boosting the valve was closed. If the throttle was closed, the valve was open. With the solenoid valve controlling the vacuum, the engine computer could factor in engine speed, and even partially open the valve if you used pulse width modulation (PWM) on the solenoid. That's how the turbo boost control valve works, PWM.

->Posting last edited on Thu, 29 May 2014 04:28:10.
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