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SN95 Cobras
Loss of PSI, Procharger.
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<blockquote data-quote="ZeroDCX" data-source="post: 14935093" data-attributes="member: 91953"><p>Remove the bypass vacuum source line and attach a vacuum pump to it. Pull vacuum and see if it holds. You could have a hole in the bypass valve diaphragm. You could also try to just remove the vacuum source line and see if it builds pressure too.</p><p></p><p>If the bypass valve is the stock plastic bosch bypass valve and you're pushing 12 psi, then you're probably exceeding the limits of the bypass valve (depending on the model number). As stated before I would have to go with either a boost leak or bypass valve issue.</p></blockquote><p></p>
[QUOTE="ZeroDCX, post: 14935093, member: 91953"] Remove the bypass vacuum source line and attach a vacuum pump to it. Pull vacuum and see if it holds. You could have a hole in the bypass valve diaphragm. You could also try to just remove the vacuum source line and see if it builds pressure too. If the bypass valve is the stock plastic bosch bypass valve and you're pushing 12 psi, then you're probably exceeding the limits of the bypass valve (depending on the model number). As stated before I would have to go with either a boost leak or bypass valve issue. [/QUOTE]
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Loss of PSI, Procharger.
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