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Old 10-23-2012, 02:49 PM
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The motor cannot run on if the throttle blades are closed. Early 70's GM cars used a solenoid that closed the blades when it was de-activated (key off). When you turned the key on, 12v activated the solenoid and it moved the throttle plates to the idle position. You can still find the arrangement in boneyards and adapt it to your carb. I haven't fooled with them for many years now, but I'll bet you could still buy a new solenoid over the counter at your local Chevy dealer.
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