Carb Solenoid
Tuned
Joined: Dec 2004
Posts: 340
Likes: 8
From: Rock Hill, SC
If it is on the throttle arm side it was an idle solenoid. When the switch was on it popped out to set your idle speed. When the switch is off it allowed the throttle to close and prevent after run or dieseling. They used those in the mid 70's.
Postmaster
Joined: Apr 2002
Posts: 3,613
Likes: 6
From: Coal country
No, a dashpot was an early emissions control device. It is a damper on the throttle closing speed, making the throttle settle back down, rather than just pop back into idle. It works on the same principle as a hydraulic door closer, but uses a mechanical spring or an air-filled balloon.
When you realase the pedal, such as to change gears or brake, the throttle snaps back quickly, and releases extra unburned hyrocarbons out the tailpipe. This happens because the vacuum momentarily draws in more fuel than air, resulting in unburned fuel from a rich mixture.
Don't ask me how the word dashpot came about. I have been trying to figure that one out for years.
When you realase the pedal, such as to change gears or brake, the throttle snaps back quickly, and releases extra unburned hyrocarbons out the tailpipe. This happens because the vacuum momentarily draws in more fuel than air, resulting in unburned fuel from a rich mixture.
Don't ask me how the word dashpot came about. I have been trying to figure that one out for years.
