I received a gift of a '75 450SLC that I drove from Arizona to New Jersey recently. It ran fine for a couple of weeks then it died on the road. It was/is running rich and wont idle without keeping the gas pedal down. I have replaced the Cold Start Valve, but it still continues to spray fuel long after the engine is started. I did find that the 104degree temp switch was cracked and put it back together (super glue). I have changed the fuel filter and I am getting fuel. Does anyone know what sensor switches might be causing the CSV to continually spray fuel? any help would be appreciated. The car is in great shape otherwise and was great to drive across country.