Michael,
Your system and control pressures with the hoses connected correctly are pretty close to what you should have. Close enough that the engine should run OK if you adjust your mixture. If your car had been running OK with a control pressure of 35 psi, it will run very lean with a control pressure of 50 psi.
There is a mixture adjustment procedure that I've seen posted that you can do without an exhaust gas analyzer that should get your mixture close to correct. Try a search in the archives.
Questions I have. With the hoses connected correctly, and the engine warm, you said that the control pressure drops from 50 to 45 psi when you remove the top vacuum hose. What happens when you remove the bottom vacuum hose (the one from the thermovalve)? What happens when you remove both vacuum hoses?
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Bill Krause
'79 911SC Euro
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