Quote:
Originally Posted by babymog
There should be a vacuum line from the manifold where your photo has an open fitting, to the bottom of the switchover valve. The electrical connection on the sensor just above the vacuum fitting on the manifold, is for the overboost protection that actuates the switchover valve.
The middle line from the switchover valve, goes to the ALDA. Top is a vent and not connected.
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It was removed for photo but is in place.
I understand the switch on manifold drives switchover unit.
I have factory vac diagram. I performed gsxr's boost-gate mod. All vac lines on passenger side are removed. System holds great vacuum. It's the 1/8" OB black with a thin white stripe line that holds vac and was connected to ALDA that I do not understand.
As someone else suggested it may have gone to a boost gauge.
Thanks.