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Old 08-05-2016, 07:21 AM   #1
N99Boxster
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Join Date: Aug 2016
Location: Pennsylvania
Posts: 5
Question Change-Over Valve on 1999 Boxster 2.5?

Does anyone know how many change-over valve used on 1999 2.5 Boxster?

According to Porsche Boxster Air Injection System diagram, it shows 1 change-over valve under the intake plenum.

When I removed the intermediate air intake and the cable throttle for a complete cleaning, I found a valve mounted next to the Starter. It looks like the change-over valve. I am not sure what it is. It has two(2) nipples. One straight nipple has a tube connected a junction that connects to the Vacuum tank, intake black rubber sleeve (passenger side), etc. The other 90 degree nipple has a tube with white protective sleeve. The other end of this long (> 2ft ) tube does not connect to anything.

See picture of the valve.

Any comments or advise to what this valve is and where the 90 degree tube w/ white sleeve should be connected to?

Thanks for your help!
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