Re: Brake Vacuum Leak?
I've seen this before. It wasn't a Corvette but the same principal applies to any vacuum brake booster. Try pinching the brake booster hose that leads to the plenum shut with a pair of pliers. The hose supplies vacuum to the brake booster. If there is a leak in there, pinching the hose will have instant and repeatable results.
Hope this helps.
SharkPilot
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