m1garand_man
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- Ft Wainwright / AK
What does the timing advance solenoid actually do? It looks like the plunger actually connects or contacts anything in the lower part of the fuel pump. If I'm right it looks like when the solenoid is energized the plunger pushes up and either opens up the check valve on the fuel return connector or it blocks the fuel flow out of the pump all together. But I'm not sure which much less why and what that does to advance the timing. Could someone explain this to me?