will this port work as a fpr vacuum source? see picture
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2002 ls1 drivers side. will this brass port right after the throttle body work as a fpr vacuum/boost source? It used to be hooked to an emissions component.
Also since the factory ecu expects the rail to be at a constant pressure, will that effect the tune when the vacuum pulls the fpr pressure down off boost.
Also since the factory ecu expects the rail to be at a constant pressure, will that effect the tune when the vacuum pulls the fpr pressure down off boost.
![](http://importevolution.com/temp/vacuum.jpg)