Re: Mike P 1955 400 Slow Resto Thread!
Posted by Ross on 2022/7/26 19:11:55
Your Treadlevac is probably fine but the check valve at the rear of the carburetor is likely sticking and not letting the carb draw the vacuum it should. It is the big hex fitting at the back of the carb with the large rubber hose going over to the vacuum tank on the driver's inner fender. Of course check all of that tubing for cracks and leaks. You can tidy up the check valve by squirting some penetrating oil into it while the engine is running.
The hesitation while accelerating is likely a weak accelerator pump in the carb. OR, there could be a sizable vacuum leak somewhere--which would also cause the problem with the power brakes.
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