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Discussion Starter #1
My Greddy Profec B Spec solenoid (dual) does not control boost anymore and I don't know how it works to fix it. This is the original black B Spec, no the B spec II. When this boost controller worked in the past, it was awesome and stable.

Does anyone know of a good aftermarket dual solenoid boost unit I can get to replace this or a good aftermarket Dual solenoid that will control boost with AEM EMS v1? (The greddy controller unit appears to work fine, but the dual solenoid part leaks uncontrollably)
 

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Discussion Starter #3 (Edited)
Cwtt,

Thanks for your reply. Since my Greddy Profec B Spec boost controller is already wired in and setup, will my Greddy boost controller be able to control this dual Mac solenoid valve setup?:


The voltmeter was showing the Greddy Profec B Spec boost controller was outputting a 12 volt signal to the solenoid unit. Given that the voltage doesn’t change when I turn the knobs, is my assumption correct that it’s a pulsed signal of some kind (pwm)?
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