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1977 930 Cold Start Idle at 2800 RPM

Fuel System

Vehicle Information: Year: 1977; Engine (Size, Modifications): 3.0; Total Mileage: 91,500;

My engine runs at about 2800 rpms on a cold start for about 40 seconds, then drops to 1200. After a few minutes it settles in at 950. I changed the warm up regulator and the rpms came down a little (2400) but the engine wouldn't run half the time so I put the old one back in. I bought the car not running so I haven't changed anything to make this happen. Is there another regulator or valve that controls cold start rpms?

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