Impala Tech - View Single Post - Power Brake Problem
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post #3 of (permalink) Old 07-27-2006, 07:37 AM Thread Starter
jerryacheson
 
 
Join Date: Jul 2006
Location: Indianapolis, IN
Posts: 17
 
There's no proportioning valve. This is an all drum car so none is needed. I'm measuring 18" of constant vacuum. Engine is stock 401. Will check valve and vacuum of entire system with pump. It just seems like a really big coincidence that the original booster and this one have the same symptoms. I can understand the original one failing; it's 44 years old.

Jerry Acheson
Indianapolis IN

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57 Chevy 3100 Pickup
59 Impala Sport Coupe
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