* allenj123, if you haven't already discovered, the cause for your immediate jump to high rpm on start up isn't the warm-up regulator. You've got an air leak in the idle bypass, a vacuum leak, or maybe some jammed throttle linkage.
* The control pressure regulator, also called the warm up regulator, modulates the control pressure, one of the (3) fuel pressures (line, control and rest fuel pressures). This is how the fuel mix is richened for a cold engine, leaned out as the engine warms up, and gives you a little extra fuel on acceleration. When the CPR goes out, you typically get one of two situations; either the engine starts ok cold and won't run right as it warms up OR the engine won't start cold (yet with starting fluid it will briefly run just fine).
* A defective control pressure regulator will never be responsible for the kind of dramatic idle rpm jump you're describing.

__________________
ASE Master Tech
Quality Enterprises
Mercedes Svc. & Restoration
Sheridan, IN
317.769.3536