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Discussion Starter #1
When I start my 83 Spider (L-Jet) from cold, the brake pedal is very hard and very high. If I pump the brakes, the pedal stays hard, but if I press it and hold it, it will sink and the engine will bog down.

Once I release the brake pedal, the idle returns to normal and the brakes work fine.

I am guessing I have a leaking or plugged vacuum line or connection somewhere, but what are the most likely suspects?
 

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Discussion Starter #5
I pulled the hose, and unscrewed the valve. I was surprised to find that there was vacuum in the line even with the car not having run for a week. I cleaned the valve and blew it out with compressed air. After I reinstalled it, I fired up and found the pedal with the expected feel.

Good call, guys, Thanks.
 
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