I am wanting to learn more about Aisan regulators, particularly the area at the top that has either an electrical solenoid, OR in my case, a vacuum line that seems to want a source of vacuum immediately on start up. I believe Toyota refers to this as the "Slow Solenoid" and Hyster manuals refer to this as the "Idle Bypass Solenoid".
What is the purpose of this solenoid? Is it supposed to give more LPG during cranking?
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