Re: hot start problem

Posted by BH On 2009/4/19 17:28:39

Gerd -

I bet that the manufacturer of the carburetor, let alone Packard, never expected these vehicles to still be in use so many decades later.

After so many years of operation and/or neglect, it is entirely possible that shaft-to-bore clearance in the throtle body has become execessive. Decades ago, as a newbie, I never considered that possibility until I met a fellow at Fall Hershey who restored carburetors; he advised that, as part of his service, he machined the bore and shaft to accept a bushing.

So, once the general area of the vacuum leak has been found, one then needs to focus their search. An aerosol carb cleaner with an extension wand works well for pinpointing areas.