Can anyone explain what the thermo time switch does and where is it located on a 380 SEL?

Thanks!

 

It controls the cold start valve, shutting it off at 42 degrees F.
It’s located on the upper part of the intake manifold.

 

What does the cold start valve do? What are some symptoms if either is failing?

 

The CSV introduces additional fuel to a cold engine to aid starting and warm the engine faster. Hard starts in cold weather with a cold engine and flooding in a warm engine are two common symptoms of failure.

 

I have figured out that my engine runs like a champ when ice cold, but when
I reach 40 degrees I get a little off idle hesitation. I have changed my thermotime
switch. Does this mean that the CSV is at fault? Is it simply 'on' (more fuel=more power) or
'off' or are there variable levels of operation?

Also, can I bypass the CSV so I get max fuel all the time?