gsxr
Thank you. That is exactly what I needed/wanted. Sorry I missed it in my search. Typically I do exhaustive and thorough searches. Blew it this time.

I am trying to fix some problems and prevent some. Not getting turbo boost, I bypassed the switchover valve with direct vacuum to the ALDA line. Turbo works. Scratching my head since the switchover does not appear to have any problems (air flows one way and not the other and the tested resistance is the same as the Y29) I haven't printed the electrical schematic from by CDs yet so I don't know where the electrical wires come and go from. I am thinking there is likely a switch related to air pressure somewhere that might me not doing what it is intended for.

Thanks again.
Seems good to drive my favorite again.
Steve

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Steve
'87 300TD - 132K - Soon 4-Sale
'84 300D Turbo - 122K - Driving
'77 VW Type II - 77K - Restored
'08 250EX Ninja
English Bulldog (Brier) - My best friend. Passed away 12/02/04 while in my arms.